add launchpad bug reports without comments

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+qemu-user reports wrong fault_addr in signal handler
+
+When a SEGV signal occurs and si_addr of the info struct is nil, qemu still tries to translate the address from host to guest (handle_cpu_signal in accel/tcg/user-exec.c). This means, that the actual signal handler, will receive a fault_addr that is something like 0xffffffffbf709000.
+
+I was able to get this to happen, by branching to a non canonical address on aarch64.
+I used 5.2 (commit: 553032db17). However, building from source, this only seems to happen, if I use the same configure flags as the debian build:
+
+../configure --static --target-list=aarch64-linux-user --disable-system --enable-trace-backends=simple --disable-linux-io-uring  --disable-pie --extra-cflags="-fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2"  --extra-ldflags="-Wl,-z,relro -Wl,--as-needed"
+
+Let me know, if you need more details.
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