cleanup cpplint warnings

Suggested by James Zern to clear out cpplint warnings for all unit
test code.

Change-Id: I731a3fa4d2a257eb9ef733426ba84286fbd7ea34
diff --git a/test/acm_random.h b/test/acm_random.h
index cd33d12..de94186 100644
--- a/test/acm_random.h
+++ b/test/acm_random.h
@@ -8,8 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef LIBVPX_TEST_ACM_RANDOM_H_
-#define LIBVPX_TEST_ACM_RANDOM_H_
+#ifndef TEST_ACM_RANDOM_H_
+#define TEST_ACM_RANDOM_H_
 
 #include "third_party/googletest/src/include/gtest/gtest.h"
 
@@ -59,4 +59,4 @@
 
 }  // namespace libvpx_test
 
-#endif  // LIBVPX_TEST_ACM_RANDOM_H_
+#endif  // TEST_ACM_RANDOM_H_