silence a windows 64 bit test failure (it's a linker warning)

Cherry picked from svn trunk. Thanks Adam.

zc.recipe.egg_/src/zc/recipe/egg/tests.py

@@ -83,7 +83,17 @@ def test_suite():
                            "-\d[.]\d-py)\d[.]\d(-\S+)?[.]egg"),
                 '\\1V.V.egg'),
                (re.compile('extdemo.c\n.+\\extdemo.exp\n'), ''),
-               (re.compile('extdemo[.]pyd'), 'extdemo.so')
+               (re.compile('extdemo[.]pyd'), 'extdemo.so'),
+               (re.compile(
+                   "extdemo[.]c\n"
+                   "extdemo[.]obj : warning LNK4197: "
+                   "export 'initextdemo' specified multiple times; "
+                   "using first specification\n"
+                   "   Creating library build\\\\temp[.]win-amd64-2[.]"
+                   "[4567]\\\\Release\\\\extdemo[.]lib and object "
+                   "build\\\\temp[.]win-amd64-2[.][4567]\\\\Re"
+                   "lease\\\\extdemo[.]exp\n"),
+                ''),
                ]),
             ),
         ))
@@ -91,4 +101,3 @@ def test_suite():
 
 if __name__ == '__main__':
     unittest.main(defaultTest='test_suite')
-