[Qemu-devel] virtio: make check regression with glib2 < 2.28

[Igor Mammedov]

commit 70556264 "libqos: use microseconds instead of iterations for
virtio timeout" regressed 'make check' when qemu is build with 
glib2 version less than 2.28

causing following error:
#make check
...
  LINK  tests/virtio-blk-test
Undefined symbols for architecture x86_64:
  "_g_get_monotonic_time", referenced from:
      _qvirtio_wait_queue_isr in virtio.o
      _qvirtio_wait_status_byte_no_isr in virtio.o
      _qvirtio_wait_config_isr in virtio.o
ld: symbol(s) not found for architecture x86_64