make the phony depfile edge order-only
authorEvan Martin <martine@danga.com>
Tue, 17 May 2011 23:36:30 +0000 (16:36 -0700)
committerEvan Martin <martine@danga.com>
Tue, 17 May 2011 23:36:30 +0000 (16:36 -0700)
commitba75e87f25e6355a12377c1d2311568e68fa7739
treef11c26f27b56d7495be5399ffa48428985728d0f
parentb4bebb7ead0461529c9ff26cbb3db6b77a2643be
make the phony depfile edge order-only

I'm not sure this is semantically different but it's consistent with
how I think about these phony edges.
src/graph.cc