* sparcl-tdep.c (_initialize_sparc_tdep) config/sparc/tm-sparc.h,

	* sparcl-tdep.c (_initialize_sparc_tdep) config/sparc/tm-sparc.h,
	config/sparc/tm-sparclite.h:  Initialize tm_print_insn from
	TM_PRINT_INSN, which comes from the tm file.

	* Makefile.in (INTERNAL_LDFLAGS):  Add in flags from configure.
	* configure configure.in:  Only make sol-thread.o for native.
	Also, switch to dlopened libthread_db.so.1.
	* sol-thread.c:  Switch to using dlopen to get the thread_db
	library.

	* configure, configure.in:  Change test for libthread_db to only
	work for configs where build/host/target are the same.