Based on new install of CCSv5.5.0.00077 and TivaWare 2.0.1.11577, I also got the problem of missing tm4c129xnczad.xml, when compiling the blinky demo.
Both the CCS and the TivaWare are fresh downloads. The TIva C-series was selected during installation of the CCS.
Any ideas how to solve ?