Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/7075031ac488
Author: Ben Francis <ben@tola.me.uk>
Desc: Merge pull request #23087 from benfrancis/1054088

Bug 1054088 - Make Google and Bing search use https by default r=daleharvey

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https://hg.mozilla.org/integration/gaia-2_0/rev/42e4e79efcad
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #23082 from crdlc/bug-1050470

Bug 1050470 - touch events not opening apps while scroll is ending

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https://hg.mozilla.org/integration/gaia-2_0/rev/aebd853d32fa
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #23181 from azasypkin/bug-1054004-l10n-race-basic-v2.0

Bug 1054004 - [Messages] There is a possible race condition between navigator.mozL10n.ready and "DOMContentLoaded". r=schung

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https://hg.mozilla.org/integration/gaia-2_0/rev/104e35d6699a
Author: Aleh Zasypkin <azasypkin@mozilla.com>
Desc: Bug 1054004 - [Messages] There is a possible race condition between navigator.mozL10n.ready and "DOMContentLoaded". r=schung
Bumping manifests a=b2g-bump