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

========

https://hg.mozilla.org/integration/gaia-central/rev/247e70ea3560
Author: Luke Chang <lchang@mozilla.com>
Desc: Merge pull request #19459 from luke-chang/1013036_stingray_static_elements

Bug 1013036 - [Stingray] Static elements on homescreen, r=johnhu, r=gchen, r=dwi2

========

https://hg.mozilla.org/integration/gaia-central/rev/bde275a21a89
Author: Luke Chang <lchang@mozilla.com>
Desc: Bug 1013036 - [Stingray] Static elements on homescreen

========

https://hg.mozilla.org/integration/gaia-central/rev/41a3fe058c50
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #19215 from alivedise/bugzilla/1009368_master/keyboard-settings

Bug 1009368 - Configure keyboard correctly, r=timdream

========

https://hg.mozilla.org/integration/gaia-central/rev/75be39139ae7
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1009368 - Configure keyboard correctly
Bumping manifests a=b2g-bump