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

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https://hg.mozilla.org/integration/gaia-central/rev/ab5fb9770471
Author: Sean Lee <weilonge@gmail.com>
Desc: Bug 1090134 - Add tv_apps path for test-agent to monitor any changes of test cases. r=rickychien

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https://hg.mozilla.org/integration/gaia-central/rev/bb503ecb7097
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Add tv_apps path for test-agent to monitor any changes of test cases."

This reverts commit 50bc1ddbe11bf6f49afbb436471e5750bbc03ca0.

Reverted for not having a bug number in the commit. Please see bug 1090134.
Bumping manifests a=b2g-bump