upstream:
commit 54d82356d8317a62f076eefdbe1ab62c88d1e6a6
Author: Ben Boeckel <mathstuf@gmail.com>
Date: Wed Dec 10 23:09:38 2014 -0500
configure: add a verbose mode
Required for Fedora infrastructure so that the commands used to build
ninja are logged.
While here, fix a typo in graph.cc: 'for for' -> 'for'
(upstream git commit 6ffb66d171a6962c2a7dad0492dffc42e65d666e)