perf build: Add libperf objects building

Move the util objects building under build framework.

Add the new libperf build object so it's separated from the rest of the
perf code and could be librarized.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Cc: Alexis Berlemont <alexis.berlemont@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-574tgt9t23tnxo9td8qjiibc@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build
index 692e1b1..aced86d 100644
--- a/tools/build/Makefile.build
+++ b/tools/build/Makefile.build
@@ -37,6 +37,9 @@
 build-file := $(dir)/Build
 include $(build-file)
 
+quiet_cmd_flex  = FLEX     $@
+quiet_cmd_bison = BISON    $@
+
 # Create directory unless it exists
 quiet_cmd_mkdir = MKDIR    $(dir $@)
       cmd_mkdir = mkdir -p $(dir $@)