Generate relative paths for build.ninja and build.ninja.d

BUG=787223
R=dpranke@chromium.org

Change-Id: I1c3aada842bba899c20d5e2c1b0dceb818f118d2
Reviewed-on: https://chromium-review.googlesource.com/784093
Reviewed-by: Brett Wilson <brettw@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#521012}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 6713d85d1567baaa3def753ed8e9bf8ee29185e2
4 files changed
tree: 3e549816b39c326aa2d0636be16b4af2c969f67d
  1. tools/