Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/7c24a2ea1822
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #17946 from AndreiH/bug_991644

Bug 991644 - [v1.3] test_settings_airplane_mode.TestAirplaneMode also fa...

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https://hg.mozilla.org/integration/gaia-1_3/rev/de0ea3400b9f
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 991644 - [v1.3] test_settings_airplane_mode.TestAirplaneMode also fails on v1.3 with bug 987145
Bumping manifests a=b2g-bump