Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/3781961f718d
Author: arvin zhang <arvin.zhang@spreadtrum.com>
Desc: Bug 1046564 - Should display normal priority message of STK_CMD_DISPLAY_TEXT command while device is Settings
Bumping manifests a=b2g-bump