Update Android toolchain to NDK r8d with GCC 4.7

Review URL: https://codereview.appspot.com/7201045

git-svn-id: http://skia.googlecode.com/svn/trunk@7343 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/opts.gyp b/gyp/opts.gyp
index af54f6e..30f464f 100644
--- a/gyp/opts.gyp
+++ b/gyp/opts.gyp
@@ -158,6 +158,10 @@
         '-mfpu=neon',
         '-fomit-frame-pointer',
       ],
+      'ldflags': [
+        '-march=armv7-a',
+        '-Wl,--fix-cortex-a8',
+      ],
       'sources': [
         '../src/opts/memset16_neon.S',
         '../src/opts/memset32_neon.S',