Fixes for skia to build for armv4t
Since we are no longer supporting the armv4 architecture (see 9336 and
9378) but instead armv4t we should test on __ARM_ARCH_4T__ instead of
__ARM_ARCH_4T__

https://review.source.android.com/Gerrit#change,9336
https://review.source.android.com/Gerrit#change,9378
diff --git a/include/core/SkMath.h b/include/core/SkMath.h
index 0c89065..94536b9 100644
--- a/include/core/SkMath.h
+++ b/include/core/SkMath.h
@@ -162,7 +162,7 @@
     With this requirement, we can generate faster instructions on some
     architectures.
 */
-#if defined(__arm__) && !defined(__thumb__) && !defined(__ARM_ARCH_4__)
+#if defined(__arm__) && !defined(__thumb__) && !defined(__ARM_ARCH_4T__)
     static inline int32_t SkMulS16(S16CPU x, S16CPU y) {
         SkASSERT((int16_t)x == x);
         SkASSERT((int16_t)y == y);