Get rid of the libqemustub.a remainders

libqemustub.a has been removed in commit ebedb37c8d ("Makefile: Remove
libqemustub.a"). Some remainders have been missed. Remove them now.

Message-Id: <20200804170055.2851-8-thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

Makefile

@@ -726,7 +726,7 @@ virtiofsd$(EXESUF): $(virtiofsd-obj-y) libvhost-user.a $(COMMON_LDADDS)
 	$(call LINK, $^)
 endif
 
-vhost-user-gpu$(EXESUF): $(vhost-user-gpu-obj-y) $(libvhost-user-obj-y) libqemuutil.a libqemustub.a
+vhost-user-gpu$(EXESUF): $(vhost-user-gpu-obj-y) $(libvhost-user-obj-y) libqemuutil.a
 	$(call LINK, $^)
 
 ifdef CONFIG_VHOST_USER_INPUT

scripts/coverity-scan/run-coverity-scan

@@ -403,9 +403,6 @@ echo "Configuring..."
     --enable-mpath --enable-libxml2 --enable-glusterfs \
     --enable-virtfs --enable-zstd
 
-echo "Making libqemustub.a..."
-make libqemustub.a
-
 echo "Running cov-build..."
 rm -rf cov-int
 mkdir cov-int

tests/test-util-sockets.c

@@ -64,7 +64,8 @@ int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp)
     return dup(mon_fd);
 }
 
-/* Syms in libqemustub.a are discarded at .o file granularity.
+/*
+ * Syms of stubs in libqemuutil.a are discarded at .o file granularity.
  * To replace monitor_get_fd() we must ensure everything in
  * stubs/monitor.c is defined, to make sure monitor.o is discarded
  * otherwise we get duplicate syms at link time.