perf tools: Makefile: Use $(QUIET_GEN) for perf.so

So that we get this:

    CC /home/acme/git/build/perf/bench/mem-memcpy-x86-64-asm.o
    GEN perf-archive
*   GEN /home/acme/git/build/perf/python/perf.so
    CC /home/acme/git/build/perf/builtin-annotate.o

Instead of silently building the python binding.

LKML-Reference: <1296890359-22659-1-git-send-email-mfwitten@gmail.com>
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Makefile

@@ -326,7 +326,7 @@ grep-libs = $(filter -l%,$(1))
 strip-libs = $(filter-out -l%,$(1))
 
 $(OUTPUT)python/perf.so: $(PYRF_OBJS)
-	@python util/setup.py --quiet  build_ext --build-lib='$(OUTPUT)python' \
+	$(QUIET_GEN)python util/setup.py --quiet  build_ext --build-lib='$(OUTPUT)python' \
 						--build-temp='$(OUTPUT)python/temp'
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