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

========

https://hg.mozilla.org/integration/gaia-1_4/rev/4115943026c9
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #20951 from mnjul/bug_1027536_lockscreen_clock_stall_v1.4

Bug 1022984 / Bug 1027536 - After Restarting Phone, Lockscreen Time Always Shows as 5:32 or Is Stalled

========

https://hg.mozilla.org/integration/gaia-1_4/rev/da4f586d7979
Author: John Lu [:mnjul] <jlu@mozilla.com>
Desc: Bug 1022984 / Bug 1027536 - After Restarting Phone, Lockscreen Time Always Shows as 5:32 or Is Stalled
Bumping manifests a=b2g-bump