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

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https://hg.mozilla.org/integration/gaia-central/rev/179d869e88e6
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #19364 from gasolin/issue-996515

Bug 996515 - [NFC] Screen shot does not have move back animation when vi..., r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/3d456fcaa1f6
Author: gasolin <gasolin@gmail.com>
Desc: Bug 996515 - [NFC] Screen shot does not have move back animation when video is failed to share

add test and fix lint

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "2e9089cee3c472528189567e6761afc33f29da67", 
+    "revision": "179d869e88e6b262a01c45aa2a9f2f3e8c997284", 
     "repo_path": "/integration/gaia-central"
 }