cmake: rename linker script for zephyr_prebuilt.elf

The linker script 'linker.cmd' is actually being used for
building zephyr_prebuilt.elf and is not the one used to
build the final binary. So rename it to better reflect
what it is used for.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
1 file changed