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/5ea5ad1a3e42
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #13133 from snowmantw/v1.2

Merge pull request #13131 from snowmantw/issue930362

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https://hg.mozilla.org/integration/gaia-1_2/rev/7d8824dfe322
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #13131 from snowmantw/issue930362

Bug 930362 - [LockScreen] The icons background would light up when touch on them(cherry picked from commit 8f01f87a1e74475ba681a37d74450d2b6361c627)