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

========

https://hg.mozilla.org/integration/gaia-central/rev/a8bd6a034187
Author: danhuang1202 <dhuang@mozilla.com>
Desc: Merge pull request #33974 from danhuang1202/1241458_backspace_key_support_in_smartList_option

Bug 1241458 - add escape and backspace key support in browser smartList

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https://hg.mozilla.org/integration/gaia-central/rev/cd4b50cc5fee
Author: danhuang1202 <danhuang1202@gmail.com>
Desc: Bug 1241458 - add escape and backspace key support
	* add escape key support in awesomescreen to close option dialog
	* add backspace key support in smartList to back to previous folder

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "e74072f15d2a07b940a4c49047e44aeec2c83032", 
+        "git_revision": "720634a735ea9382f43c217ff327057d205bffba", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "8a846a13aa7784ef14a71ba1d64a89ce02b5c210", 
+    "revision": "a8bd6a03418712f231829e5438b18afd58ca960b", 
     "repo_path": "integration/gaia-central"
 }