Add gyp rules to exclude _aurax11 and _aurawin files when appropriate

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 9963f45adc6a35d42de45243423560146fb14703..29d3d63e5bf3d25d782f5a5e1302f94e2f37b9d7 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -1240,6 +1240,12 @@
           ['use_aura==0', {
             'sources/': [ ['exclude', '_aura\\.(h|cc)$'] ]
           }],
+          ['use_aura==0 or use_x11==0', {
+            'sources/': [ ['exclude', '_aurax11\\.(h|cc)$'] ]
+          }],
+          ['use_aura==0 or OS!="win"', {
+            'sources/': [ ['exclude', '_aurawin\\.(h|cc)$'] ]
+          }],
         ],
       }],
     ],  # target_conditions for 'target_defaults'