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

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https://hg.mozilla.org/integration/gaia-central/rev/9b29b2b76fa9
Author: Yuren Ju <yurenju@gmail.com>
Desc: Merge pull request #19308 from yurenju/app-rules

Bug 1008114 - separate app-makefile to multiple rules in makefile r=@cctuan

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https://hg.mozilla.org/integration/gaia-central/rev/f437bfec1293
Author: Yuren Ju <yurenju@gmail.com>
Desc: Bug 1008114 - separate app-makefile to multiple rules in makefile
Bumping manifests a=b2g-bump