Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/c97e0443c462
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #11027 from huchengtw-moz/system/bug_888821_ua_profile_configuration_based_on_mcc_mnc

Bug 888821 - B2G MMS: UA profile configuration based on MNC and MCC. r=archurcc

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https://hg.mozilla.org/integration/gaia-central/rev/0b74b2a7ae98
Author: John Hu <johu@mozilla.com>
Desc: Bug 888821 - B2G MMS: UA profile configuration based on MNC and MCC.