Bumping gaia.json for 7 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/36b38906a4b9
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #17856 from pivanov/bug-970286

Bug 970286 - [VDR][Bluetooth] Apply Buttons and Input areas [BB]

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https://hg.mozilla.org/integration/gaia-central/rev/81cd2e65b295
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 970286 - [VDR][Bluetooth] Apply Buttons and Input areas [BB]

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https://hg.mozilla.org/integration/gaia-central/rev/e72cfe09404b
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #18046 from vingtetun/Makefile-hotfix

Bug 993022 - CSS Linter is broken on will-change property after bug 8973...

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https://hg.mozilla.org/integration/gaia-central/rev/9bb5d3ee562b
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Bug 993022 - CSS Linter is broken on will-change property after bug 897352. r=Rik

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https://hg.mozilla.org/integration/gaia-central/rev/ba8afcf2fa68
Author: Fernando Rodríguez Sela <frsela@tid.es>
Desc: Merge pull request #17943 from frsela/STK/Bug989852

Bug 989852 - [Sora][STK]'OK ' item is grayed when execute 'Get input' with a default text and user input command., r=vingtetun

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https://hg.mozilla.org/integration/gaia-central/rev/05bed93687f3
Author: Fernando Rodriguez Sela <frsela@tid.es>
Desc: Bug 989852 - [Sora][STK]'OK ' item is grayed when execute 'Get input' with a default text and user input command., r=vingtetun

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https://hg.mozilla.org/integration/gaia-central/rev/838bfacc10d5
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 989980 - Do not run if an old version of optipng is detected and honor the -k parameter when processing animated PNGs
Bumping manifests a=b2g-bump