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_neon.cc b/source/rotate_neon.cc
index f8a0c8e..49b3003 100644
--- a/source/rotate_neon.cc
+++ b/source/rotate_neon.cc
@@ -26,12 +26,12 @@
                        uint8* dst, int dst_stride,
                        int width) {
   asm volatile (
-    // loops are on blocks of 8.  loop will stop when
-    // counter gets to or below 0.  starting the counter
+    // loops are on blocks of 8. loop will stop when
+    // counter gets to or below 0. starting the counter
     // at w-8 allow for this
     "sub         %4, #8                        \n"
 
-    // handle 8x8 blocks.  this should be the majority of the plane
+    // handle 8x8 blocks. this should be the majority of the plane
     ".p2align  4                               \n"
     "1:                                        \n"
       "mov         r9, %0                      \n"
@@ -81,7 +81,7 @@
       "subs        %4,  #8                     \n"  // w   -= 8
       "bge         1b                          \n"
 
-    // add 8 back to counter.  if the result is 0 there are
+    // add 8 back to counter. if the result is 0 there are
     // no residuals.
     "adds        %4, #8                        \n"
     "beq         4f                            \n"
@@ -193,12 +193,12 @@
                          uint8* dst_b, int dst_stride_b,
                          int width) {
   asm volatile (
-    // loops are on blocks of 8.  loop will stop when
-    // counter gets to or below 0.  starting the counter
+    // loops are on blocks of 8. loop will stop when
+    // counter gets to or below 0. starting the counter
     // at w-8 allow for this
     "sub         %6, #8                        \n"
 
-    // handle 8x8 blocks.  this should be the majority of the plane
+    // handle 8x8 blocks. this should be the majority of the plane
     ".p2align  4                               \n"
     "1:                                        \n"
       "mov         r9, %0                      \n"
@@ -264,7 +264,7 @@
       "subs        %6,  #8                     \n"  // w     -= 8
       "bge         1b                          \n"
 
-    // add 8 back to counter.  if the result is 0 there are
+    // add 8 back to counter. if the result is 0 there are
     // no residuals.
     "adds        %6, #8                        \n"
     "beq         4f                            \n"