perfcounter tools: move common defines ... to local header file

No change, move of duplicated stuff only.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/Documentation/perf_counter/Makefile b/Documentation/perf_counter/Makefile
index 877cf5d..481e4c2 100644
--- a/Documentation/perf_counter/Makefile
+++ b/Documentation/perf_counter/Makefile
@@ -287,6 +287,7 @@
 LIB_FILE=libperf.a
 
 LIB_H += ../../include/linux/perf_counter.h
+LIB_H += perf.h
 LIB_H += util/levenshtein.h
 LIB_H += util/parse-options.h
 LIB_H += util/quote.h