Some errors were encountered while compiling QEMU source code
Description of problem:
When I try to download the source code from gitlab and compile it, the output is as follows:

```
FAILED: subprojects/libvhost-user/libvhost-user.a.p/libvhost-user.c.o 
clang -m64 -mcx16 -Isubprojects/libvhost-user/libvhost-user.a.p -Isubprojects/libvhost-user -I../subprojects/libvhost-user -fcolor-diagnostics -Wall -Winvalid-pch -Werror -std=gnu11 -O2 -g -fsanitize=fuzzer-no-link -fsanitize=undefined -fsanitize=address -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common -fwrapv -Wold-style-definition -Wtype-limits -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wempty-body -Wnested-externs -Wendif-labels -Wexpansion-to-defined -Wno-initializer-overrides -Wno-missing-include-dirs -Wno-shift-negative-value -Wno-string-plus-int -Wno-typedef-redefinition -Wno-tautological-type-limit-compare -fstack-protector-strong -fprofile-instr-generate -fcoverage-mapping -fPIE -pthread -D_GNU_SOURCE -MD -MQ subprojects/libvhost-user/libvhost-user.a.p/libvhost-user.c.o -MF subprojects/libvhost-user/libvhost-user.a.p/libvhost-user.c.o.d -o subprojects/libvhost-user/libvhost-user.a.p/libvhost-user.c.o -c ../subprojects/libvhost-user/libvhost-user.c
In file included from ../subprojects/libvhost-user/libvhost-user.c:43:
../subprojects/libvhost-user/include/atomic.h:1:1: error: expected identifier or '('
../../../include/qemu/atomic.h
^
In file included from ../subprojects/libvhost-user/libvhost-user.c:45:
../subprojects/libvhost-user/libvhost-user.h:23:10: fatal error: 'standard-headers/linux/virtio_ring.h' file not found
#include "standard-headers/linux/virtio_ring.h"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
[69/1511] Compiling C object subprojects/libvhost-user/libvhost-user-glib.a.p/libvhost-user-glib.c.o
FAILED: subprojects/libvhost-user/libvhost-user-glib.a.p/libvhost-user-glib.c.o 
clang -m64 -mcx16 -Isubprojects/libvhost-user/libvhost-user-glib.a.p -Isubprojects/libvhost-user -I../subprojects/libvhost-user -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -fcolor-diagnostics -Wall -Winvalid-pch -Werror -std=gnu11 -O2 -g -fsanitize=fuzzer-no-link -fsanitize=undefined -fsanitize=address -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common -fwrapv -Wold-style-definition -Wtype-limits -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wempty-body -Wnested-externs -Wendif-labels -Wexpansion-to-defined -Wno-initializer-overrides -Wno-missing-include-dirs -Wno-shift-negative-value -Wno-string-plus-int -Wno-typedef-redefinition -Wno-tautological-type-limit-compare -fstack-protector-strong -fprofile-instr-generate -fcoverage-mapping -fPIE -pthread -Wno-unused-function -MD -MQ subprojects/libvhost-user/libvhost-user-glib.a.p/libvhost-user-glib.c.o -MF subprojects/libvhost-user/libvhost-user-glib.a.p/libvhost-user-glib.c.o.d -o subprojects/libvhost-user/libvhost-user-glib.a.p/libvhost-user-glib.c.o -c ../subprojects/libvhost-user/libvhost-user-glib.c
In file included from ../subprojects/libvhost-user/libvhost-user-glib.c:15:
In file included from ../subprojects/libvhost-user/libvhost-user-glib.h:19:
../subprojects/libvhost-user/libvhost-user.h:23:10: fatal error: 'standard-headers/linux/virtio_ring.h' file not found
#include "standard-headers/linux/virtio_ring.h"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
[70/1511] Generating trace-hw_alpha.h with a custom command
[71/1511] Generating hmp-commands-info.h with a custom command (wrapped by meson to capture output)
[72/1511] Generating qemu-img-cmds.h with a custom command (wrapped by meson to capture output)
[73/1511] Generating hmp-commands.h with a custom command (wrapped by meson to capture output)
[74/1511] Generating qemu-options.def with a custom command (wrapped by meson to capture output)
[75/1511] Compiling C object libslirp.a.p/slirp_src_tcp_input.c.o
[76/1511] Compiling C object libcapstone.a.p/capstone_arch_SystemZ_SystemZDisassembler.c.o
[77/1511] Generating qemu-version.h with a custom command (wrapped by meson to capture output)
[78/1511] Compiling C object libcapstone.a.p/capstone_arch_AArch64_AArch64Disassembler.c.o
[79/1511] Compiling C object libcapstone.a.p/capstone_arch_ARM_ARMInstPrinter.c.o
[80/1511] Compiling C object libcapstone.a.p/capstone_arch_ARM_ARMDisassembler.c.o
[81/1511] Compiling C object libcapstone.a.p/capstone_arch_AArch64_AArch64InstPrinter.c.o
ninja: build stopped: subcommand failed.
Makefile:163: recipe for target 'run-ninja' failed
make: *** [run-ninja] Error 1
```

I looked for the missing file standard-headers/linux/virtio_ring.h and found that the file existed.
Steps to reproduce:
1. ``git clone https://gitlab.com/qemu-project/qemu``
2. ``CC=clang CXX=clang++ ../configure --enable-fuzzing  --enable-sanitizers``
3. ``make qemu-fuzz-i386``