Bug 921071 - Add in-tree configs for B2G emulator-ics. r=aki

--HG--
rename : b2g/config/emulator/config.json => b2g/config/emulator-ics/config.json
rename : b2g/config/emulator/releng-emulator.tt => b2g/config/emulator-ics/releng-emulator-ics.tt