get-google-files: fix path to proprietary

Apparently this error has been here since my last commit on this was merged. My apologies for not testing thoroughly.

Change-Id: If346403b8e2cf90c960d13340684312d66086676

get-google-files

@@ -39,7 +39,7 @@ def download(version):
             print "Extracting %s" % filename
             try:
                 bytes = zip.read(filename)
-                fd = open("proprietary/"+os.path.basename(filename),"wb")
+                fd = open(os.path.join(os.path.dirname(__file__), "proprietary", os.path.basename(filename)),"wb")
                 fd.write(bytes)
                 fd.close()
             except Exception, e: