Add ETC1 format to SkTextureCompressor

R=robertphillips@google.com

Author: krajcevski@google.com

Review URL: https://codereview.chromium.org/432143002
diff --git a/gyp/utils.gyp b/gyp/utils.gyp
index f6b00da..e12c87a 100644
--- a/gyp/utils.gyp
+++ b/gyp/utils.gyp
@@ -8,6 +8,7 @@
       'standalone_static_library': 1,
       'dependencies': [
         'core.gyp:*',
+        'etc1.gyp:libetc1',
       ],
       'includes': [
         'utils.gypi',