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

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https://hg.mozilla.org/integration/gaia-1_4/rev/dd968d60b510
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #19325 from AndreiH/bug_1011469_v1.4

Bug 1011469 v1.4

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https://hg.mozilla.org/integration/gaia-1_4/rev/8abc9eda9ca6
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 1011469 - Intermittent test_cost_control_reset_wifi.TestCostControlReset on v1.4
Bumping manifests a=b2g-bump