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

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https://hg.mozilla.org/integration/gaia-central/rev/fb8f27ffe7bb
Author: Fabrice Desré <fabrice@desre.org>
Desc: Merge pull request #24542 from sudheesh001/Patch_1061519

Bug 1061519 - Fixes jshint error in tests/atoms/gaia_apps.js r=fabrice

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https://hg.mozilla.org/integration/gaia-central/rev/fc671933b73b
Author: sudheesh001 <sudheesh1995@outlook.com>
Desc: Bug 1061519 - Fixes jshint error in tests/atoms/gaia_apps.js

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https://hg.mozilla.org/integration/gaia-central/rev/40374f8ee39b
Author: Julien Wajsberg <felash@gmail.com>
Desc: Revert "Merge pull request #23939 from steveck-chung/crop-image-workaround"

This reverts commit d6f841f5bef301f5b19b03f5bf149b4c65b97f5e, reversing
changes made to 32d82d288abe2e55146c10c066234e8ba4982836.

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https://hg.mozilla.org/integration/gaia-central/rev/187702fbaf48
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 1026306 - when mobile data isn't connected, wifi hotspot setting silently fails and disables itself.r=alive"

This reverts commit 1a562f0914bd0058edf6cb5dac703ebb3cbce25b.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "3e26562fdae3c2d6ad385e4a8fb1a499fc277cef", 
+    "revision": "fb8f27ffe7bb7dbdffa0aa68e9e9ce893a44ab21", 
     "repo_path": "/integration/gaia-central"
 }