touchups to experimental gyp file for osx and windows
touchups to experimental gyp file for osx and windows

elaberge/node-zipfile,gravitystorm/node-zipfile,elaberge/node-zipfile,gravitystorm/node-zipfile,gravitystorm/node-zipfile,elaberge/node-zipfile,elaberge/node-zipfile,gravitystorm/node-zipfile