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

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https://hg.mozilla.org/integration/gaia-central/rev/e6a1cfc70305
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #28064 from sean2449/Bug_1130250

Bug 1130250 - [Stingray][AppDeck] The focused button at bottom the should be a complete circle, r=johnhu, r=dwi2

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https://hg.mozilla.org/integration/gaia-central/rev/a472262ac31a
Author: Sung Chiu <suchiu@mozilla.com>
Desc: Bug 1130250 - [Demo][Stingray] The bottom app that you selected should be a complete circle

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https://hg.mozilla.org/integration/gaia-central/rev/d87284aa9f02
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #27951 from timdream/bug1128053

Bug 1128053, revert bug 1085233

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https://hg.mozilla.org/integration/gaia-central/rev/f96c97ff6367
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Revert "Merge pull request #25305 from timdream/value-selector-focus"

This reverts commit 47faa4651f8feb11152ef475850cc9641fd5cbeb, reversing
changes made to 4c7e1e5f68ec57241d488568080732b318d652f5.

Conflicts:
	build/jshint/xfail.list

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "60012edd27515175f56612b2b716d8a664a048d1", 
+        "git_revision": "462a2ef9e98134255c144e373c7392440e3ee03b", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "141032bd342a53d951361fd11c5686263e4c8ee4", 
+    "revision": "e6a1cfc70305b3695b694d7e66b03c51f2a45b1f", 
     "repo_path": "integration/gaia-central"
 }