perf tools: Move BUILD_ID_SIZE into build-id object

Moving BUILD_ID_SIZE define into build-id object, plus include related
changes.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Namhyung Kim <namhyung@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1351372712-21104-3-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/event.h

@@ -6,6 +6,7 @@
 
 #include "../perf.h"
 #include "map.h"
+#include "build-id.h"
 
 /*
  * PERF_SAMPLE_IP | PERF_SAMPLE_TID | *
@@ -96,8 +97,6 @@ struct perf_sample {
 	struct stack_dump user_stack;
 };
 
-#define BUILD_ID_SIZE 20
-
 struct build_id_event {
 	struct perf_event_header header;
 	pid_t			 pid;