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

========

https://hg.mozilla.org/integration/gaia-central/rev/72091c26237f
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #18374 from chirarobert/943897

Bug 943897 - Code timeout into contacts_settings.tap_import_from_sim()

========

https://hg.mozilla.org/integration/gaia-central/rev/c8bde513b936
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 943897 - Code timeout into contacts_settings.tap_import_from_sim()

I get the number of sim contacts before opening the apps because the method switches to default frame.
Bumping manifests a=b2g-bump