ppc64 migration bad_dest test is failed with failed to connect to socket

On ppc64le machine the following test failed.

# QTEST_QEMU_BINARY=ppc64-softmmu/qemu-system-ppc64 tests/migration-test V=1
/ppc64/migration/deprecated: OK
/ppc64/migration/bad_dest: qemu-system-ppc64: Failed to connect socket: Connection refused
OK
/ppc64/migration/postcopy/unix: OK

Head is at f6d81cdec807bb85325afedb536b17c5331483c7
configured with options: configure --target-list=ppc64-softmmu

This test case is added through 2c9bb29703caa8fd31078cc38b3b53762557c27c