sample: Add MCUX IPM sample application

Add MCUX IPM sample application. It can be run on lpcxpresso54114
board at the moment.

We first build the slave core image out of the remote/ dir than the
primary core image is build which includes the slave core image.

Origin: Original

Signed-off-by: Stanislav Poboril <stanislav.poboril@nxp.com>
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>