meson: convert tests/qtest to meson

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/meson.build b/meson.build
index d3b7486..99daa91 100644
--- a/meson.build
+++ b/meson.build
@@ -535,6 +535,9 @@
 subdir('scsi')
 subdir('block')
 
+# needed for fuzzing binaries
+subdir('tests/qtest/libqos')
+
 block_mods = []
 softmmu_mods = []
 foreach d, list : modules