Bumping gaia.json for 4 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/5c4471194377
Author: gitmai <mri@tid.es>
Desc: Merge pull request #14498 from gitmai/bug-947865-broken-settings

Bug 947865 -[Cost Control] Settings are broken and unusable
r=salva

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https://hg.mozilla.org/integration/gaia-central/rev/978b0a74f9a7
Author: mai <mri@tid.es>
Desc: Bug 947865 -[Cost Control] Settings are broken and unusable

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https://hg.mozilla.org/integration/gaia-central/rev/de7e41e5f7d6
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #14522 from ian-liu/settings/Bug926334_To_support_WPAEAP_options_PEAP_TLS_TTLS

Bug 926334 - [Gaia] To support WPA-EAP options(PEAP, TLS, TTLS) and manage certificate in WLAN setting. r=@crh0716

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https://hg.mozilla.org/integration/gaia-central/rev/91ffdea45fc6
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #13989 from ian-liu/settings/Bug926334_To_support_EAP-SIM_and_WPA-EAP_option_in_WLAN_settin

Bug 926334 - [Gaia] To support WPA-EAP options(PEAP, TLS, TTLS) and manage certificate in WLAN setting. r=@crh0716