Bug 933141 - Move NFC files out of system/gonk. r=gps, dimi

--HG--
rename : dom/system/gonk/NfcContentHelper.js => dom/nfc/NfcContentHelper.js
rename : dom/system/gonk/Nfc.js => dom/nfc/gonk/Nfc.js
rename : dom/system/gonk/Nfc.manifest => dom/nfc/gonk/Nfc.manifest
rename : dom/system/gonk/NfcGonkMessage.h => dom/nfc/gonk/NfcGonkMessage.h
rename : dom/system/gonk/NfcMessageHandler.cpp => dom/nfc/gonk/NfcMessageHandler.cpp
rename : dom/system/gonk/NfcMessageHandler.h => dom/nfc/gonk/NfcMessageHandler.h
rename : dom/system/gonk/NfcOptions.h => dom/nfc/gonk/NfcOptions.h
rename : dom/system/gonk/NfcService.cpp => dom/nfc/gonk/NfcService.cpp
rename : dom/system/gonk/NfcService.h => dom/nfc/gonk/NfcService.h
rename : dom/system/gonk/nfc_consts.js => dom/nfc/gonk/nfc_consts.js
rename : dom/system/gonk/nsINfcService.idl => dom/nfc/gonk/nsINfcService.idl
rename : dom/system/gonk/nsINfcContentHelper.idl => dom/nfc/nsINfcContentHelper.idl