Update android_make to support both --gcc and --clang options.

gyp/freetype.gyp

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # Target for building freetype.
 {
   'targets': [
     {
       'target_name': 'freetype',
       'type': 'none',
@@ skipping 84 matching lines @@
           'cflags': [
             '-W',
             '-Wall',
             '-fPIC',
             '-DPIC',
             '-DDARWIN_NO_CARBON',
             '-DFT2_BUILD_LIBRARY',
             '-O2',
           ],
         }],
+        [ 'skia_clang_build == 1', {
+          'cflags':[
+            '-Wno-error',
+          ],
+        }],
       ],
     },
   ],
 }