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

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https://hg.mozilla.org/integration/gaia-central/rev/c1fd0c75afd4
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #23710 from kamituel/Bug_1026373_remove_shrinking_rejected

Bug 1026373 - Remove unused shrinking-rejected. r=gweng

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https://hg.mozilla.org/integration/gaia-central/rev/116515f35ca7
Author: Kamil Leszczuk <kamituel@gmail.com>
Desc: Bug 1026373: Remove unused shrinking-rejected
Bumping manifests a=b2g-bump