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

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https://hg.mozilla.org/integration/gaia-central/rev/2c699526acf1
Author: Fernando Campo <fernando.campo@telefonica.com>
Desc: Merge pull request #19647 from fcampo/ftu-style-folder-1013791

Bug 1013791 - The styles folder of the FTU app does not comply with other apps (r=arcturus)

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https://hg.mozilla.org/integration/gaia-central/rev/c3752e4183ce
Author: Fernando Campo <fernando.campo@telefonica.com>
Desc: Bug 1013791 - The styles folder of the FTU app does not comply with other apps
Bumping manifests a=b2g-bump