Bumping gaia.json for 1 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/77db8875a08e
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #15061 from EragonJ/bug-955954

Bug 955954 - "SIM 1" show up on some places on a one-SIM device
(cherry picked from commit 4c64dc55d4d69cca6ca81ccffa1bf72e9a3b3ee6)