automake: make install-lib-links less chatty

There is little point in echoing everything that the script does
to stdout. Wrap it in AM_V_GEN so that a reasonable message is
printed as a indication of it's invocation.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Jon TURNEY <jon.turney@dronecode.org.uk>

install-lib-links.mk

@@ -4,7 +4,7 @@
 all-local : .libs/install-mesa-links
 
 .libs/install-mesa-links : $(lib_LTLIBRARIES)
-	$(MKDIR_P) $(top_builddir)/$(LIB_DIR)
+	$(AM_V_GEN)$(MKDIR_P) $(top_builddir)/$(LIB_DIR);	\
 	for f in $(lib_LTLIBRARIES:%.la=.libs/%.so*); do	\
 		if test -h .libs/$$f; then			\
 			cp -d $$f $(top_builddir)/$(LIB_DIR);	\