Add the newly included FLAC third party library to the DEPS file and ignore

list.

I have also set the svn:ignore property for the 'flac' subdir under third_party
directory, though I guess it can't be seen in the review.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6205006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71593 0039d316-1c4b-4281-b951-d872f2087c98

.gitignore

@@ -75,6 +75,7 @@ v8.log
 /third_party/cros
 /third_party/cygwin
 /third_party/directxsdk
+/third_party/flac
 /third_party/ffmpeg
 /third_party/gles2_conform
 /third_party/googlemac

DEPS

@@ -180,6 +180,9 @@ deps = {
 
   "src/third_party/libjpeg_turbo":
     "/trunk/deps/third_party/libjpeg_turbo@66929",
+
+  "src/third_party/flac":
+    "/trunk/deps/third_party/flac@71053",
 }