Bumping gaia.json for 2 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/9753403327a1
Author: Trif Andrei-Alin <trifandreialin@gmail.com>
Desc: Merge pull request #13902 from AndreiH/bug933817_v1.2

Bug 933817 - Removed all marketplace tests (excluding smoketest) and its...

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https://hg.mozilla.org/integration/gaia-1_2/rev/e26a34ba2dc7
Author: Karan <karan.basi@mail.utoronto.ca>
Desc: Bug 933817 - Removed all marketplace tests (excluding smoketest) and its app folder