Support Express for 2013 automatic toolchain

Pick up setting for Express 2013 to get WDK_DIR set (required
for ATL with Express).

Add additional "or 2013e" to build/common.gypi, but exclude
unneeded workaround for intsafe.h.

R=dpranke@chromium.org
BUG=323300, 340358

Review URL: https://codereview.chromium.org/153143002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248747 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248747