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

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https://hg.mozilla.org/integration/gaia-central/rev/b033e280989a
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #13279 from MBRSL/bug-931719-orientation

Bug 931719 - [HW test] unlock button in orientation test test doesn't work, r=gasolin

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https://hg.mozilla.org/integration/gaia-central/rev/650ed059ff42
Author: Tom Jao <tjao@mozilla.com>
Desc: Bug 931719 - [HW test] unlock button in orientation test test doesn't work

Modified codes to switch-case so that js would not complain for missing buttons