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

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https://hg.mozilla.org/integration/gaia-central/rev/2ac3dd299034
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #15892 from davidflanagan/bug959049v2

Merge pull request #15702 from davidflanagan/bug959049

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https://hg.mozilla.org/integration/gaia-central/rev/6c993c3a6733
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #15702 from davidflanagan/bug959049

Bug 959049: reduce keyboard row height and font-size in landscape mode(cherry picked from commit cfeb5bf7e7665e4be412d1f774bd46fadeff3c93)

fix lint

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "d818ea3ebb2a3500a772cda2c0811c299b862682", 
+    "revision": "2ac3dd29903494924e7449c1e75c145a41a88454", 
     "repo_path": "/integration/gaia-central"
 }