Use --gclientfile instead of --spec, because windows is THE WORST.

--spec contains newlines, which are interpreted as actual newlines in the
command line, which causes gclient to fall apart at the seams.

TBR=agable@chromium.org, kjellander@webrtc.org, szager@chromium.org
BUG=2863, chromium:339647

Review URL: https://webrtc-codereview.appspot.com/22429004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6944 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/.gitignore b/.gitignore
index 64ccdd5..2535251 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,6 +37,7 @@
 /Makefile
 /build
 /buildtools
+/chromium/.gclient.bot
 /chromium/.gclient_entries
 /chromium/.last_sync_chromium
 /chromium/src