Manual path slash normalization in ExpandSpecial (windows ninja)
Manual path slash normalization in ExpandSpecial (windows ninja)

Not using os.path.normpath per comment and https://groups.google.com/group/gyp-developer/browse_thread/thread/a48db62b5776922a
Review URL: https://chromiumcodereview.appspot.com/9431025

git-svn-id: e7e1075985beda50ea81ac4472467b4f6e91fc78@1226 78cadc50-ecff-11dd-a971-7dbc132099af

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