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

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https://hg.mozilla.org/integration/gaia-central/rev/b87d5e66a818
Author: Yoshi Huang <allstars.chh@mozilla.com>
Desc: Merge pull request #19655 from kamituel/Bug_1003723_utf16

Bug 1003723: Support for UTF-16 encoded RTD_TEXT NDEF records. r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/afdce7a488d9
Author: Kamil Leszczuk <kamituel@gmail.com>
Desc: Bug 1003723: Support for UTF-16 encoded RTD_TEXT NDEF records
Bumping manifests a=b2g-bump