Removed ichol0.cc, icholt.cc, ilu0.cc, iluc.cc, ilutp.cc. Created __ichol__.cc and __ilu__.cc. Minor bugs fixed. * libinterp/dldfcn/__ichol__.cc: File created now contains __ichol0__ and __icholt__ functions. * libinterp/dldfcn/__ilu__.cc: File created now contains __ilu0__ __iluc__ and __ilutp__ functions. * scripts/sparse/ichol.m: Tests have been moved from .cc files to this one. * changed scripts/sparse/ilu.m: Tests have been moved from .cc files to this one.