The MKL46Z4.h (originally MKL46Z4_CMSIS.h) and system_MKL46Z4.h files are 
from KL46_SC.exe, the folders:

	kinetis_kl46_sc_rev2/klxx-sc-baremetal/src/cpu/headers
	kinetis_kl46_sc_rev2/klxx-sc-baremetal/src/cpu

The cmsis_device.h was added for convenience.

