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

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https://hg.mozilla.org/integration/gaia-central/rev/f03758a0397f
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #16513 from chirarobert/fix_language_issue

Bug 975386 - Fix intermitten failure for test_settings_change_keyboard_l...

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https://hg.mozilla.org/integration/gaia-central/rev/353c315f223e
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 975386 - Fix intermitten failure for test_settings_change_keyboard_language.pyFix for test_settings_change_keyboard_language.py.
Added a wait for the newly added keyboard to appear in the list.

Ran an adhoc with this test and it passed http://qa-selenium.mv.mozilla.com:8080/job/b2g.hamachi.mozilla-central.ui.adhoc/225/

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https://hg.mozilla.org/integration/gaia-central/rev/fc18c478d9d8
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #16566 from zacc/bug_976009

Bug 976009 -  Address intermittent in test _unlock_to_passcode on Travis

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https://hg.mozilla.org/integration/gaia-central/rev/767a071ca0d5
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 976009 -  Address intermittent in test _unlock_to_passcode on Travis

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "546d410a2735272a23bf96e947852944d9ae589e", 
+    "revision": "f03758a0397f8d3c6558713bc04b5022d7b41a76", 
     "repo_path": "/integration/gaia-central"
 }