Bumping gaia.json for 2 gaia revision(s) a=gaia-bump
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https://hg.mozilla.org/integration/gaia-2_1/rev/
b4e86f9ca5f6
Author: ian-liu <iliu@mozilla.com>
Desc: Bug
1123602 - [Media Storage] After enable UMS and plug->unplug USB cable, 'SD Card' option added on Default Media Location even when no SD card or inserted an unreadable SD card
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https://hg.mozilla.org/integration/gaia-2_1/rev/
7c0eb7fafe55
Author: chaochao.huang <chaochao.huang@spreadtrum.com>
Desc: Bug
1121794 - [dolphin][FxA]The error message can not be returned. r=ferjm