Add a placeholder file for ARM64 Rotate Neon implementation

BUG=319
TESTED=libyuv_unittest
R=fbarchard@google.com

Review URL: https://webrtc-codereview.appspot.com/18189004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1073 16f28f9a-4ce2-e073-06de-1de4eb20be90

libyuv.gyp

@@ -74,6 +74,7 @@
             # sources.
             'source/compare_neon.cc',
             'source/rotate_neon.cc',
+            'source/rotate_neon64.cc',
             'source/row_neon.cc',
             'source/row_neon64.cc',
             'source/scale_neon.cc',

source/rotate.cc

@@ -55,6 +55,20 @@ void TransposeUVWx8_NEON(const uint8* src, int src_stride,
                          uint8* dst_a, int dst_stride_a,
                          uint8* dst_b, int dst_stride_b,
                          int width);
+#elif !defined(LIBYUV_DISABLE_NEON) && !defined(__native_client__) && \
+    (defined(__aarch64__) || defined(LIBYUV_NEON))
+// #define HAS_MIRRORROW_NEON
+// void MirrorRow_NEON(const uint8* src, uint8* dst, int width);
+// #define HAS_MIRRORROW_UV_NEON
+// void MirrorUVRow_NEON(const uint8* src, uint8* dst_a, uint8* dst_b, int width);
+// #define HAS_TRANSPOSE_WX8_NEON
+// void TransposeWx8_NEON(const uint8* src, int src_stride,
+//                        uint8* dst, int dst_stride, int width);
+// #define HAS_TRANSPOSE_UVWX8_NEON
+// void TransposeUVWx8_NEON(const uint8* src, int src_stride,
+//                          uint8* dst_a, int dst_stride_a,
+//                          uint8* dst_b, int dst_stride_b,
+//                          int width);
 #endif  // defined(__ARM_NEON__)
 
 #if !defined(LIBYUV_DISABLE_MIPS) && !defined(__native_client__) && \