Allow use of SKIA_OUT on Windows

This works as expected, except that %SKIA_OUT% must be on the same drive

R=djsollen@google.com

Review URL: https://codereview.chromium.org/18467010

git-svn-id: http://skia.googlecode.com/svn/trunk@9972 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed