linux: use an in-tree copy of gold by default

DEPS

 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://svn.webkit.org/repository/webkit/trunk",
   "nacl_trunk": "http://src.chromium.org/native_client/trunk",
   "webkit_revision": "106096",
   "chromium_git": "http://git.chromium.org/git",
   "swig_revision": "69281",
@@ skipping 390 matching lines @@
 
     "src/third_party/lss":
       ((Var("googlecode_url") % "linux-syscall-support") + "/trunk/lss@" +
        Var("lss_revision")),
 
     "src/third_party/openssl":
       "/trunk/deps/third_party/openssl@118977",
 
     "src/third_party/WebKit/Tools/gdb":
       Var("webkit_trunk") + "/Tools/gdb@" + Var("webkit_revision"),
+
+    "src/third_party/gold":
+      "/trunk/deps/third_party/gold@119943",
   },
 }
 
 
 include_rules = [
   # Everybody can use some things.
   "+base",
   "+build",
   "+ipc",
 
@@ skipping 54 matching lines @@
     # which takes ~20s, but clang speeds up builds by more than 20s.
     "pattern": ".",
     "action": ["python", "src/tools/clang/scripts/update.py", "--mac-only"],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]