system_wrappers: Fix include header guards.

webrtc/system_wrappers/include/atomic32.h

Index: webrtc/system_wrappers/include/atomic32.h
diff --git a/webrtc/system_wrappers/include/atomic32.h b/webrtc/system_wrappers/include/atomic32.h
index 36ca144bdaf5d148e8c263008ff9beddfda63034..78e649d8b6ec348f9502c4a23ee9d452d351fcae 100644
--- a/webrtc/system_wrappers/include/atomic32.h
+++ b/webrtc/system_wrappers/include/atomic32.h
@@ -12,8 +12,8 @@
 // doing, use locks instead! :-)
 //
 // Note: assumes 32-bit (or higher) system
-#ifndef WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ATOMIC32_H_
-#define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ATOMIC32_H_
+#ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ATOMIC32_H_
+#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ATOMIC32_H_
 
 #include <stddef.h>
 
@@ -63,4 +63,4 @@ class Atomic32 {
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ATOMIC32_H_
+#endif  // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ATOMIC32_H_