Adding msvs2013 support to scons.

Rather than absorb the risk of a scons upgrade at this moment,
patching scons to support msvs2013, so that we can use our new 32-bit trybots.

BUG=http://code.google.com/p/chromium/issues/detail?id=357183
TEST=local on bot
R=jvoung@chromium.org

Review URL: https://codereview.chromium.org/218403011

git-svn-id: svn://svn.chromium.org/native_client/trunk/src/third_party/scons-2.0.1@12970 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2
2 files changed