Add a general rule that excludes files matching auralinux on windows.

Add a general rule to exclude files ending with _auralinux 
on platforms other than Linux or when aura support is not enabled.

BUG=

Review URL: https://codereview.chromium.org/50393002

git-svn-id: http://src.chromium.org/svn/trunk/src/build@231742 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

filename_rules.gypi

@@ -92,6 +92,9 @@
     ['<(use_aura)==0 or OS!="win" or >(nacl_untrusted_build)==1', {
       'sources/': [ ['exclude', '_aurawin\\.(h|cc)$'] ]
     }],
+    ['<(use_aura)==0 or OS!="linux" or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_auralinux\\.(h|cc)$'] ]
+    }],
     ['<(use_ash)==0 or >(nacl_untrusted_build)==1', {
       'sources/': [ ['exclude', '_ash(_browsertest|_unittest)?\\.(h|cc)$'],
                     ['exclude', '(^|/)ash/'],