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

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https://hg.mozilla.org/integration/gaia-1_4/rev/8d91277a211c
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #19630 from gitmai/bug-1013786-patch-for-v1.4

Bug 1013786 - Add Contact is broken when adding more than 1 tel number

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https://hg.mozilla.org/integration/gaia-1_4/rev/49291ede5a33
Author: mai <mri@tid.es>
Desc: Bug 1013786 - Add Contact is broken when adding more than 1 tel number
Bumping manifests a=b2g-bump