Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/b5ab7d98497a
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23003 from KevinGrandon/bug_1055183_update_jshint_global_styles

Bug 1055183 - Update JSHint global styles

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https://hg.mozilla.org/integration/gaia-central/rev/086b6319e017
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1055183 - Update JSHint global styles r=julienw

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https://hg.mozilla.org/integration/gaia-central/rev/cb889ca9ebf8
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #22954 from mikehenrty/bug-1052241-disable-netactivity

Bug 1052241 - Disable network activity icon in DEBUG mode

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https://hg.mozilla.org/integration/gaia-central/rev/9851386b48c4
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1052241 - Disable network activity icon in DEBUG mode

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https://hg.mozilla.org/integration/gaia-central/rev/c71ecf5062c0
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Merge pull request #22993 from gabrielesvelto/bug-974984-wappush-debug

Bug 974984 - Added basic debug logging r=julienw

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https://hg.mozilla.org/integration/gaia-central/rev/fb73ffb806d6
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 974984 - Added basic debug logging r=julienw
Bumping manifests a=b2g-bump