Introduce nolimips system library.
	
	* src/vm/nolimips_system_library.hh,
	* src/vm/nolimips_system_library.hxx,
	* src/vm/nolimips_system_library.cc:
	Provide a set of some libc functions as syscalls.
	* src/vm/Makefile.am: Distribute these new files.
	* src/vm-tasks.cc: Fix missing include.