Make clang the default Android compiler.

BUG=skia:5215
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1919873003

Review URL: https://codereview.chromium.org/1919873003
diff --git a/gyp/freetype.gyp b/gyp/freetype.gyp
index f282f77..d68d33a 100644
--- a/gyp/freetype.gyp
+++ b/gyp/freetype.gyp
@@ -104,7 +104,7 @@
         }],
         [ 'skia_clang_build == 1', {
           'cflags':[
-            '-Wno-error',
+            '-w',
           ],
         }],
       ],