Add 2 missing neon files for the android build

R=borenet@google.com

Review URL: https://codereview.chromium.org/16404009

git-svn-id: http://skia.googlecode.com/svn/trunk@9490 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/libwebp.gyp b/gyp/libwebp.gyp
index a2f5cfd..4b36fbb 100644
--- a/gyp/libwebp.gyp
+++ b/gyp/libwebp.gyp
@@ -74,6 +74,8 @@
               ],
               'sources': [
                 '../third_party/externals/libwebp/src/dsp/dec_neon.c',
+                '../third_party/externals/libwebp/src/dsp/enc_neon.c',
+                '../third_party/externals/libwebp/src/dsp/upsampling_neon.c',
               ],
               # behavior similar dsp_neon.c.neon in an Android.mk
               'cflags!': [