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

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https://hg.mozilla.org/integration/gaia-central/rev/7075f5263087
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #24129 from davidflanagan/bug1065877

Bug 1065877: prevent OOMs when editing, picking and sharing large images r=russnicoletti

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https://hg.mozilla.org/integration/gaia-central/rev/fad560ead475
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1065877: prevent OOMs when editing, picking and sharing large images

address review comments

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https://hg.mozilla.org/integration/gaia-central/rev/e1c762dc4bce
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #23878 from mikehenrty/bug-1062998-fix-connectivity

Bug 1062998 - Update signal icons when showing SIM Manager

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https://hg.mozilla.org/integration/gaia-central/rev/c927b8a65d43
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1062998 - Update signal icons when showing SIM Manager
Bumping manifests a=b2g-bump