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

========

https://hg.mozilla.org/integration/gaia-central/rev/073c60a57840
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #24422 from crdlc/bug-1069867

Bug 1069867 - [Contacts] ICE section appears on top of the selection lis...

========

https://hg.mozilla.org/integration/gaia-central/rev/ac3f4e1cf6fe
Author: crdlc <crdlc@tid.es>
Desc: Bug 1069867 - [Contacts] ICE section appears on top of the selection list right after a contact is set

========

https://hg.mozilla.org/integration/gaia-central/rev/8ff1cba37755
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #24343 from viorelaioia/bug_1071592

                                                                                                                                                    Bug 1071592 - Fix intermittent failure in test_keyboard.py

========

https://hg.mozilla.org/integration/gaia-central/rev/4a3e0770623f
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1071592 - Fix intermittent failure in test_keyboard.py
Bumping manifests a=b2g-bump