Change gflags and gmock includes to be full paths.

This will fix PRESUBMIT warnings developers will get due to
r7014 and r7020.

Also some minor style cleanup in:
webrtc/modules/audio_coding/main/test/RTPFile.cc
webrtc/modules/audio_coding/neteq/test/RTPjitter.cc

BUG=
R=henrik.lundin@webrtc.org, niklas.enbom@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/23429004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7058 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/DEPS b/DEPS
index 70877b7..60387c4 100644
--- a/DEPS
+++ b/DEPS
@@ -49,6 +49,7 @@
 
 # checkdeps.py shouldn't check include paths for files in these dirs:
 skip_child_includes = [
+  'gflags',
   'testing',
   'third_party',
 ]