perf counts: Add missing headers needed for types used

We get these by sheer luck, since we're cleaning unneeded headers use,
this needs to be done first to avoid breakage down the line.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-p7bncbi53t4p2kobkbmu86a4@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/counts.h

@@ -2,8 +2,12 @@
 #ifndef __PERF_COUNTS_H
 #define __PERF_COUNTS_H
 
+#include <linux/types.h>
 #include <internal/xyarray.h>
 #include <perf/evsel.h>
+#include <stdbool.h>
+
+struct evsel;
 
 struct perf_counts {
 	s8			  scaled;