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

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https://hg.mozilla.org/integration/gaia-central/rev/9a8fc6181218
Author: Yura Zenevich <yura.zenevich@gmail.com>
Desc: Merge pull request #30568 from yzen/bug-1156786-string-update

Bug 1156786 - updating super swiper achievement to customizer champ.

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https://hg.mozilla.org/integration/gaia-central/rev/11d2f2a3f13d
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1156786 - updating super swiper achievement to customizer champ.

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https://hg.mozilla.org/integration/gaia-central/rev/02055803c780
Author: Yura Zenevich <yura.zenevich@gmail.com>
Desc: Merge pull request #30420 from yzen/bug-1162040-settings

Bug 1162040 - updating accessibility for gaia-icons used in settings …

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https://hg.mozilla.org/integration/gaia-central/rev/b7cd738e1b97
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1162040 - updating accessibility for gaia-icons used in settings app.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "41314de6a43aec60539f0679f0c03103403ea926", 
+        "git_revision": "7dda863fb006fd3cb77c8e92aec739b2f829115b", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "fbb9918f70331f7abd862c0175a5e31787104900", 
+    "revision": "9a8fc6181218d1cec0a41a8f8edd5ef6855d14eb", 
     "repo_path": "integration/gaia-central"
 }