Remove -mfpmath=sse for clang, which does it automatically and sometimes is annoyed by it.

BUG=skia:

NOTREECHECKS=true
R=mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/296793003

git-svn-id: http://skia.googlecode.com/svn/trunk@14812 2bbb7eff-a529-9590-31e7-b0007b416f81

gyp/common_conditions.gypi

@@ -435,6 +435,9 @@
               # Extra warnings we like but that only Clang knows about.
               '-Wstring-conversion',
             ],
+            'cflags!': [
+                '-mfpmath=sse',  # Clang doesn't need to be told this, and sometimes gets confused.
+            ],
           }],
           [ 'skia_keep_frame_pointer', {
             'cflags': [ '-fno-omit-frame-pointer' ],