roll gyp 1675:1678

DEPS

 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 
 vars = {
   # Use this googlecode_url variable only if there is an internal mirror for it.
   # If you do not know, use the full path while defining your new deps entry.
   "googlecode_url": "http://%s.googlecode.com/svn",
   "sourceforge_url": "http://%(repo)s.svn.sourceforge.net/svnroot/%(repo)s",
   "webkit_trunk": "http://src.chromium.org/blink/trunk",
   "nacl_trunk": "http://src.chromium.org/native_client/trunk",
@@ skipping 87 matching lines @@
   "src/third_party/leveldatabase/src":
     (Var("googlecode_url") % "leveldb") + "/trunk@75",
 
   "src/third_party/snappy/src":
     (Var("googlecode_url") % "snappy") + "/trunk@74",
 
   "src/tools/grit":
     (Var("googlecode_url") % "grit-i18n") + "/trunk@129",
 
   "src/tools/gyp":
-    (Var("googlecode_url") % "gyp") + "/trunk@1675",
+    (Var("googlecode_url") % "gyp") + "/trunk@1678",
 
   "src/tools/swarm_client":
     "/trunk/tools/swarm_client@" + Var("swarm_revision"),
 
   "src/v8":
     (Var("googlecode_url") % "v8") + "/trunk@" + Var("v8_revision"),
 
   "src/native_client":
     Var("nacl_trunk") + "/src/native_client@" + Var("nacl_revision"),
 
@@ skipping 502 matching lines @@
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
   {
     # Check for landmines (reasons to clobber the build).
     "name": "landmines",
     "pattern": ".",
     "action": ["python", "src/build/landmines.py"],
   },
 ]