uLUt library header files can be moved to include/ulut subdirectory.

uLUt library header files can be moved to include/ulut subdirectory.

If the option
  CONFIG_OC_ULUT_INCDIR=y
is selected, the copy of uLUt library header files
is added into "ulut" subdirectory of include location
but copy in commonly used top level location is
provided as well.

If the
  CONFIG_OC_ULUT_INCDIRONLY=y
option is enabled the the uLUt header files are placed
only in "ulut" subdirectory location.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>