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

========

https://hg.mozilla.org/integration/gaia-central/rev/8503ad943f74
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #17155 from jmcanterafonseca/fix_sim_names

Bug 926572 - [B2G][Contacts] Last name appears twice when merging an imp...

========

https://hg.mozilla.org/integration/gaia-central/rev/7d39d480c66a
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 926572 - [B2G][Contacts] Last name appears twice when merging an imported SIM contact with Facebook contact
Bumping manifests a=b2g-bump
Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/aef5e6f3cb6b
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #16099 from jrburke/bug969609-email-notification-black-screen

Bug 969609 - [B2G][Email]Opening an email notification then pressing back in the email app leads to a black screen r=asuth

========

https://hg.mozilla.org/integration/gaia-central/rev/839fac80ff35
Author: jrburke <jrburke@gmail.com>
Desc: Bug 969609 - [B2G][Email]Opening an email notification then pressing back in the email app leads to a black screen.
Bumping manifests a=b2g-bump
Bug 983518: Fix running B2G-1.4 on KitKat by whitelisting sigalstack in the sandbox. r=kang r=jld
Merge m-c to b-i
Bug 983215 - Handle optional argument correctly in send()/sendMMS(). r=gene
Merge m-c to b2g-inbound
Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/1b537b86025c
Author: Borja Salguero <borjasalguero@users.noreply.github.com>
Desc: Merge pull request #16483 from borjasalguero/ftu_fxa

Bug 897600 Add firefox accounts screen to FTE flow r=arcturus,ferjm

========

https://hg.mozilla.org/integration/gaia-central/rev/2ea62d79f624
Author: Borja Salguero <borja.salguero@gmail.com>
Desc: Bug 897600 Add firefox accounts screen to FTE flow r=arcturus,ferjm
Bumping manifests a=b2g-bump
Merge b-i to m-c