Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/256902cd6762
Author: Yi-Fan Liao <yliao@mozilla.com>
Desc: Merge pull request #33981 from begeeben/1241787_missing_browsers_toolbar

Bug 1241787 - [TV 2.5][Browser] Missing browser's toolbar after opening the link "Learn More" in "Private Browsing" page, r=dhuang

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https://hg.mozilla.org/integration/gaia-central/rev/475a59c4337c
Author: yifan <yliao@mozilla.com>
Desc: Bug 1241787 - [TV 2.5][Browser] Missing browser's toolbar after opening the link "Learn More" in "Private Browsing" page

* Let TV browser open the page instead of handling the window.open in the smart-system.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "720634a735ea9382f43c217ff327057d205bffba", 
+        "git_revision": "77c0e08caa0dda8c6e50f6e7cbad9f79b320a3b0", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "a8bd6a03418712f231829e5438b18afd58ca960b", 
+    "revision": "256902cd676226f40965b353e0ec12e9b0372290", 
     "repo_path": "integration/gaia-central"
 }