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

========

https://hg.mozilla.org/integration/gaia-central/rev/c74809c0a807
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #18569 from RudyLu/keyboard/Bug985333-key_popup_case

Bug 985333 - [Keyboard UX update][User Story] Default Upper case layout
r=timdream.

========

https://hg.mozilla.org/integration/gaia-central/rev/a75b34e0fbd2
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 985333 - [Keyboard UX update][User Story] Default Upper case layout
and typing hints.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "787e0db2b536a3f1105c12819d48a8a584d5d4d6", 
+    "revision": "c74809c0a80749c7631594f558e71489cc7097b4", 
     "repo_path": "/integration/gaia-central"
 }