Move Neon source to its own files.
BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/860009

git-svn-id: http://libyuv.googlecode.com/svn/trunk@396 16f28f9a-4ce2-e073-06de-1de4eb20be90
diff --git a/source/rotate_argb.cc b/source/rotate_argb.cc
index 33e1050..9c99446 100644
--- a/source/rotate_argb.cc
+++ b/source/rotate_argb.cc
@@ -58,7 +58,7 @@
                   uint8* dst, int dst_stride,
                   int width, int height) {
   // Rotate by 90 is a ARGBTranspose with the source read
-  // from bottom to top.  So set the source pointer to the end
+  // from bottom to top. So set the source pointer to the end
   // of the buffer and flip the sign of the source stride.
   src += src_stride * (height - 1);
   src_stride = -src_stride;
@@ -69,7 +69,7 @@
                     uint8* dst, int dst_stride,
                     int width, int height) {
   // Rotate by 270 is a ARGBTranspose with the destination written
-  // from bottom to top.  So set the destination pointer to the end
+  // from bottom to top. So set the destination pointer to the end
   // of the buffer and flip the sign of the destination stride.
   dst += dst_stride * (width - 1);
   dst_stride = -dst_stride;
@@ -109,7 +109,7 @@
   if (width * 4 > kMaxStride) {
     return;
   }
-  // Swap first and last row and mirror the content.  Uses a temporary row.
+  // Swap first and last row and mirror the content. Uses a temporary row.
   SIMD_ALIGNED(uint8 row[kMaxStride]);
   const uint8* src_bot = src + src_stride * (height - 1);
   uint8* dst_bot = dst + dst_stride * (height - 1);