Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/a99ff14b3258
Author: Martijn <martijn.martijn@gmail.com>
Desc: Merge pull request #32718 from mwargers/1217870

Bug 1217870 - test_homescreen_status_bar_icons_visibility.py doesn't run anymore

========

https://hg.mozilla.org/integration/gaia-central/rev/9433fa486249
Author: Martijn Wargers <mwargers@mozilla.com>
Desc: Bug 1217870 - test_homescreen_status_bar_icons_visibility.py doesn't run anymore

========

https://hg.mozilla.org/integration/gaia-central/rev/2230c0ced30d
Author: Guillaume C. Marty <gmarty@users.noreply.github.com>
Desc: Merge pull request #32653 from gmarty/Bug-1216394-After-cleared-browsing-history-no-History-Top-sites-new

Bug 1216394 - [Browser] After you cleared browsing history, cookie, a…

========

https://hg.mozilla.org/integration/gaia-central/rev/919a021b0681
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1216394 - [Browser] After you cleared browsing history, there is no 'History' and 'Top sites' any more

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "9a30d133eb9a606886bdd7d461543a3cadb9b7fc", 
+        "git_revision": "a26eadc5e1133d5112b6cbc10badbb7670a1090f", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "c9a2d77ff14ebf77e224cd09a276e40fa101c4d9", 
+    "revision": "a99ff14b3258f49f5902775a5e3b849f3455714a", 
     "repo_path": "integration/gaia-central"
 }