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

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https://hg.mozilla.org/integration/gaia-2_0/rev/d695faeb204d
Author: Fernando Campo <fcampo@users.noreply.github.com>
Desc: Merge pull request #21459 from fcampo/fte-region-mcc-894121

Bug 894121 - Using MCC automatically selects wrong timezone (r=francisco,achen)

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https://hg.mozilla.org/integration/gaia-2_0/rev/b59b51a835d9
Author: gitmai <mri@tid.es>
Desc: Merge pull request #20546 from gitmai/bug-837678-CC-perf-test

Bug 837678 - [cost control] Implement new startup loading events
r=salva

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https://hg.mozilla.org/integration/gaia-2_0/rev/257332fb1e77
Author: Panagiotis Astithas <pastith@gmail.com>
Desc: Merge pull request #21925 from past/keyboard-bug-1040012

Bug 1040012 - Long press on period key in the Greek keyboard should show...

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https://hg.mozilla.org/integration/gaia-2_0/rev/27f69732ea14
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #21759 from etiennesegonzac/bug-1034985

Bug 1034985 - Prevent switch notification to show up for inactive preloaded attention screens r=21
Bumping manifests a=b2g-bump