fix link deadlock when setting LINK.host to $(LINK)
fix link deadlock when setting LINK.host to $(LINK)

This resulted in double call to flock on linux/make.

BUG=http://code.google.com/p/chromium/issues/detail?id=143274

Review URL: https://chromiumcodereview.appspot.com/10854195
old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google