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

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https://hg.mozilla.org/integration/gaia-central/rev/59ee65ad814e
Author: Sergi Mansilla <sergi.mansilla@gmail.com>
Desc: Merge pull request #21547 from sergi/slow-settings

Bug 1024893 - [dolphin][v1.4]Entering settings app takes more than 2.2s r=yurenju r=arthurcc

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https://hg.mozilla.org/integration/gaia-central/rev/3b57821a90e9
Author: Sergi Mansilla <sergi.mansilla@gmail.com>
Desc: Bug 1024893 - [dolphin][v1.4]Entering settings app takes more than 2.2s
Bumping manifests a=b2g-bump