roll gyp 1640:1643

1641: ninja: Enable deps mode on non-windows.
1642: revert 1641
1643: Make rule variables to work with generated sources.

BUG=none
TBR=bungeman

Review URL: https://codereview.chromium.org/16374008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@204074 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -104,7 +104,7 @@ deps = {
     (Var("googlecode_url") % "grit-i18n") + "/trunk@121",
 
   "src/tools/gyp":
-    (Var("googlecode_url") % "gyp") + "/trunk@1640",
+    (Var("googlecode_url") % "gyp") + "/trunk@1643",
 
   "src/tools/swarm_client":
     "/trunk/tools/swarm_client@" + Var("swarm_revision"),