perf: Fix UAPI fallout

The UAPI commits forgot to test tooling builds such as tools/perf/,
and this fixes the fallout.

Manual conversion.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index aab414f..dd64261 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -7,7 +7,7 @@
 #include "symbol.h"
 #include "thread.h"
 #include <linux/rbtree.h>
-#include "../../../include/linux/perf_event.h"
+#include "../../../include/uapi/linux/perf_event.h"
 
 struct sample_queue;
 struct ip_callchain;