libperf: Add 'overwrite' to 'struct perf_mmap'

Move 'overwrite' from tools/perf's mmap to libperf's perf_mmap struct.

Committer notes:

Add stdbool.h as we start using 'bool'.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-17-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index ebf5b93..47c09f3 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -4,6 +4,7 @@
 
 #include <linux/refcount.h>
 #include <linux/types.h>
+#include <stdbool.h>
 
 /**
  * struct perf_mmap - perf's ring buffer mmap details
@@ -19,6 +20,7 @@ struct perf_mmap {
 	u64		 prev;
 	u64		 start;
 	u64		 end;
+	bool		 overwrite;
 };
 
 #endif /* __LIBPERF_INTERNAL_MMAP_H */