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

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https://hg.mozilla.org/integration/gaia-central/rev/c73da6ea8fae
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #29196 from Cwiiis/bug1147786-homescreen-delete-multiple-dialogs

Bug 1147786 - Fix being able to show delete-app dialog twice. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/cb0a3c68af4d
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1147786 - Fix being able to show delete-app dialog twice. r=kgrandon

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "6bbcae6e002d0c5eba7444728d49875a5f706d37", 
+        "git_revision": "72d400bc43c7221210b9bf0c8dedafa8775ea5db", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "7a94f3f4f394f9051d5e784c3505738d39d4ac55", 
+    "revision": "c73da6ea8fae54f54ea2869b8f929f198bd12e08", 
     "repo_path": "integration/gaia-central"
 }