Linux: add GYP flag for -fno-strict-aliasing.

We're still figuring out what to do about strict aliasing and V8. In
the mean time, V8 (and other parts of the code) are unbuildable with
GCC 4.4 and strict aliasing. Adding this flag at the request of fta.

http://codereview.chromium.org/164538


git-svn-id: http://src.chromium.org/svn/trunk/src/build@23421 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -354,6 +354,7 @@
         # be disabled in ~/.gyp/include.gypi on the valgrind builders.
         'variables': {
           'werror%': '-Werror',
+          'no_strict_aliasing%': 0,
         },
         'cflags': [
           '<(werror)',  # See note above about the werror variable.
@@ -539,6 +540,11 @@
               }],
             ],
           }],
+          ['no_strict_aliasing==1', {
+            'cflags': [
+              '-fno-strict-aliasing',
+            ],
+          }],
         ],
       },
     }],