zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/tools/perf/util/sysfs.h b/ap/os/linux/linux-3.4.x/tools/perf/util/sysfs.h
new file mode 100644
index 0000000..a813b72
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/tools/perf/util/sysfs.h
@@ -0,0 +1,6 @@
+#ifndef __SYSFS_H__
+#define __SYSFS_H__
+
+const char *sysfs_find_mountpoint(void);
+
+#endif /* __DEBUGFS_H__ */