perf build: Add make check-headers target

Don't print header differences during the perf build as it's noisy.
Mostly people won't care and find it annoying.

As it's to improve perf trace beautifier to catch up new changes mostly
in UAPIs, we can make it a separate build target and call it
occasionally.  Make it and build-test related targets phony.

Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

tools/perf/Makefile

@@ -111,6 +111,9 @@ build-test:
 build-test-tarball:
 	@$(MAKE) -f tests/make REUSE_FEATURES_DUMP=1 MK=Makefile SET_PARALLEL=1 --no-print-directory out
 
+check-headers:
+	@./check-headers.sh
+
 #
 # All other targets get passed through:
 #
@@ -118,4 +121,4 @@ build-test-tarball:
 	$(print_msg)
 	$(make)
 
-.PHONY: tags TAGS FORCE Makefile
+.PHONY: tags TAGS FORCE Makefile build-test build-test-tarball check-headers

tools/perf/Makefile.perf

@@ -285,7 +285,6 @@ goals := $(filter-out all sub-make, $(MAKECMDGOALS))
 $(goals) all: sub-make
 
 sub-make: fixdep
-	@./check-headers.sh
 	$(Q)$(MAKE) FIXDEP_BUILT=1 -f Makefile.perf $(goals)
 
 else # force_fixdep