* sparcobsd-tdep.c: Include "gdbcore.h", "regcache.h" and

* sparcobsd-tdep.c: Include "gdbcore.h", "regcache.h" and
"bsd-uthread.h".
(SPARC32OBSD_UTHREAD_FP_OFFSET, SPARC32OBSD_UTHREAD_PC_OFFSET):
New defines.
(sparc32obsd_supply_uthread, sparc32obsd_collect_uthread): New
functions.
(sparc32obsd_init_abi): Set supply_uthread and collect_uthread.
* Makefile.in (sparcobsd-tdep.o): Update dependencies.
* config/sparc/obsd.mt (TDEPFILES): Add bsd-uthread.o.
* config/sparc/obsd64.mt (TDEPFILES): Likewise.