deps: fix V8 5.1 tests

Restore whitespaces in *.golden files. They were lost when I landed the
V8 5.1 update and are needed for the tests to pass.

Fixes: https://github.com/nodejs/node/issues/7477
PR-URL: https://github.com/nodejs/node/pull/7488


Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>