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

========

https://hg.mozilla.org/integration/gaia-central/rev/e700a9786fd6
Author: Min-Zhong "John" Lu <mnjul@users.noreply.github.com>
Desc: Merge pull request #22767 from mnjul/bug_1052272_marionette_fix_for_1044744

Bug 1052272 - TEST-UNEXPECTED-FAIL | /builds/slave/test/gaia/apps/keyboard/test/marionette/uninstallation_test.js | Show Keyboard App after uninstallation "before each" hook. r=timdream

========

https://hg.mozilla.org/integration/gaia-central/rev/18afab11016f
Author: John Lu [:mnjul] <jlu@mozilla.com>
Desc: Bug 1052272 - TEST-UNEXPECTED-FAIL | /builds/slave/test/gaia/apps/keyboard/test/marionette/uninstallation_test.js | Show Keyboard App after uninstallation "before each" hook
Bumping manifests a=b2g-bump