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

========

https://hg.mozilla.org/integration/gaia-central/rev/3d86acf2f2d8
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #12626 from etiennesegonzac/bug-920422-add-call-workflow

Bug 920422 - Showing the contacts tab when we place a new call from the call screen. r=rik

========

https://hg.mozilla.org/integration/gaia-central/rev/018e6094ab33
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Bug 920422 - Showing the contacts tab when we place a new call from the
call screen.
r=rik

========

https://hg.mozilla.org/integration/gaia-central/rev/f424392e7f53
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #12585 from etiennesegonzac/bug-915573-custom-tel-type

Bug 915573 - Do not translate custom phone types in the call screen additional infos. r=rik

========

https://hg.mozilla.org/integration/gaia-central/rev/362bf7cae7f3
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Bug 915573 - Do not translate custom phone types in the call screen
additional infos. r=rik