revert unintended change

git-svn-id: http://src.chromium.org/svn/trunk/src/build@23443 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -151,7 +151,7 @@
       ['OS=="win"', {
         'conditions': [
           ['MSVS_VERSION=="2005"', {
-            'msvs_multi_core_compile%': 1,
+            'msvs_multi_core_compile%': 0,
           },{
             'msvs_multi_core_compile%': 1,
           }],