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
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 9abe70f..00835f9 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -144,6 +144,11 @@
                        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(