Remove std:: prefixes from C functions in webrtc/.

std::memcpy -> memcpy for instance. This change was motivated by a
compile report complaining that std::rand() was used instead of rand(),
probably with a stdlib.h include instead of cstdlib. Use of C functions
without the std:: prefix is a lot more common, so removing std:: to
address this.

BUG=
R=tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/9549004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5658 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/system_wrappers/interface/template_util.h b/webrtc/system_wrappers/interface/template_util.h
index 5ae415b..410e04c 100644
--- a/webrtc/system_wrappers/interface/template_util.h
+++ b/webrtc/system_wrappers/interface/template_util.h
@@ -13,7 +13,7 @@
 #ifndef WEBRTC_SYSTEM_WRAPPERS_INTERFACE_TEMPLATE_UTIL_H_
 #define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_TEMPLATE_UTIL_H_
 
-#include <cstddef>  // For size_t.
+#include <stddef.h>  // For size_t.
 
 namespace webrtc {