libvpx/ads2gas_apple.pl: prefix comment delimiter '@' with a space for clang integrated assembler.

source/libvpx/build/make/ads2gas_apple.pl

 #!/usr/bin/env perl
 ##
 ##  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 ##
 ##  Use of this source code is governed by a BSD-style license
 ##  that can be found in the LICENSE file in the root of the source
 ##  tree. An additional intellectual property rights grant can be found
 ##  in the file PATENTS.  All contributing project authors may
 ##  be found in the AUTHORS file in the root of the source tree.
 ##
@@ skipping 28 matching lines @@
     $string =~ s/\s+$//;
     return $string;
 }
 
 while (<STDIN>)
 {
     # Load and store alignment
     s/@/,:/g;
 
     # Comment character
-    s/;/@/g;
+    s/;/ @/g;
 
     # Hexadecimal constants prefaced by 0x
     s/#&/#0x/g;
 
     # Convert :OR: to |
     s/:OR:/ | /g;
 
     # Convert :AND: to &
     s/:AND:/ & /g;
 
@@ skipping 152 matching lines @@
 
     s/qsubaddx/qsax/i;
     s/qaddsubx/qasx/i;
     s/ldrneb/ldrbne/i;
     s/ldrneh/ldrhne/i;
     s/(vqshrun\.s16 .*, \#)0$/${1}8/i;
     s/\.include/#include/;
 
     print;
 }