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

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https://hg.mozilla.org/integration/gaia-central/rev/3f8ff8eeb895
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #27836 from dholbert/patch-1

Bug 1127898: Drop unnecessary 'height on .composer-button-container. r=azasypkin

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https://hg.mozilla.org/integration/gaia-central/rev/402e06477bc2
Author: Daniel Holbert <githubnsm@dmailnet.com>
Desc: Bug 1127898: Drop unnecessary 'height on .composer-button-container. r=azasypkin

The .composer-button-container element will already stretch its height to match its parent, due to the (default) "align-self:stretch" behavior.

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https://hg.mozilla.org/integration/gaia-central/rev/97e1287a56e5
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #27653 from gpgreen/lightsensordelay_819744

Bug 819744 - Delay the light sensor response in screen_manager.js r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/d2b05051a7cc
Author: Greg Green <gpgreen@gmail.com>
Desc: Bug 819744 - Delay the light sensor response in screen_manager.js r=timdream

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "4171327fce4803c52b2fae8071b114a70a3a68a7", 
+        "git_revision": "43793904d5d2cac77cdee4c72186854fb0f25fb2", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "102827256edbff3e2c691b16a18807512da118c3", 
+    "revision": "3f8ff8eeb895fe2df2a4f34fc0d168d865944109", 
     "repo_path": "integration/gaia-central"
 }