mkimage logs are required for signature on CC8X and CC8M platforms. Create a
copy in the 'imx-boot-tools' deploy directory so a prebuilt imx-boot file can
be later signed using the standalone signature procedure.
Build the 'print_fit_hab' target unconditionally so the log is available for
future standalone signature processes.
Also, use 'CONFIG_MKIMAGE_LOG_PATH' and 'CONFIG_FIT_HAB_LOG_PATH' variables to
point to the logs before calling the sign scripts. We no longer require
creating a symbolic link of the log files.
Signed-off-by: Gonzalo Ruiz <Gonzalo.Ruiz@digi.com>