Regenerate xLights/xLights.cbp.mak

The previous version was generated without using the cbp2make
"--with-deps --keep-outdir --keep-objdir" options it appears.

"make makefile" in the top level directory can be used to regenerate
this file with the desired cbp2make command line options.  This should
also happen automatically if you run "make" from the top level directory
and xLights/xLights.cbp is newer than the .mak file.