Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_1/rev/aa11a85ec5df
Author: Oscar Patiño <opatinowebrtc@gmail.com>
Desc: bug 1091775 - adding new png files for status bar

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https://hg.mozilla.org/integration/gaia-2_1/rev/c77c457985dc
Author: Luke Chang <lchang@mozilla.com>
Desc: Bug 1088024 - [Flame] The first activity window causes the foreground app can't be rotated to landscape

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https://hg.mozilla.org/integration/gaia-2_1/rev/140e30dcdb59
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1088456: unload the current video if the view activity is running and we are still in the foreground

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https://hg.mozilla.org/integration/gaia-2_1/rev/d488b3e92361
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1091310 - block-type tags inside a tags should be wrapped by the a tag r=asuth

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https://hg.mozilla.org/integration/gaia-2_1/rev/6da30fa08703
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1081403 - [email] two searches that result in the same number of matches can lead to empty search list
Bumping manifests a=b2g-bump