Import NetBSD/hpcmips source files from hpcmips repository.
file list:
sys/arch/hpcmips/
distrib/hpcmips/
etc/etc.hpcmips/
lib/libc/arch/mips/fplib/
lib/libc/arch/mips/fplib/Makefile.inc
lib/libc/arch/mips/fplib/environment.h
lib/libc/arch/mips/fplib/fplib_glue.c
lib/libc/arch/mips/fplib/fplib_libc.c
lib/libc/arch/mips/fplib/hpcmips-gcc.h
lib/libc/arch/mips/fplib/softfloat-macros.h
lib/libc/arch/mips/fplib/softfloat-specialize.h
lib/libc/arch/mips/fplib/softfloat.c
lib/libc/arch/mips/fplib/softfloat.h
lib/libc/arch/mips/gen/ieee.h
lib/libc/arch/mips/gen/sf_fabs.c
lib/libc/arch/mips/gen/sf_flt_rounds.c
lib/libc/arch/mips/gen/sf_fpgetmask.c
lib/libc/arch/mips/gen/sf_fpgetround.c
lib/libc/arch/mips/gen/sf_fpgetsticky.c
lib/libc/arch/mips/gen/sf_fpsetmask.c
lib/libc/arch/mips/gen/sf_fpsetround.c
lib/libc/arch/mips/gen/sf_fpsetsticky.c
lib/libc/arch/mips/gen/sf_isinf.c
lib/libc/arch/mips/gen/sf_ldexp.c
lib/libc/arch/mips/gen/sf_modf.c
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