More file types to check for (C).

- objective C++           (31)
 - objective C             (4)
 - C                       (2)
 - alternate C++ extension (1)
 - Go                      (1)

BUG=skia:

Review URL: https://codereview.chromium.org/1032143002

PRESUBMIT.py

@@ -144,6 +144,11 @@ def _CommonChecks(input_api, output_api):
                        x.LocalPath().endswith('.gyp') or
                        x.LocalPath().endswith('.py') or
                        x.LocalPath().endswith('.sh') or
+                       x.LocalPath().endswith('.m') or
+                       x.LocalPath().endswith('.mm') or
+                       x.LocalPath().endswith('.go') or
+                       x.LocalPath().endswith('.c') or
+                       x.LocalPath().endswith('.cc') or
                        x.LocalPath().endswith('.cpp'))
   results.extend(
       _CheckChangeHasEol(