* sparc64nbsd-tdep.c: Include "objfiles.h".

(sparc64nbsd_init_abi): Set in_solib_call_trampoline and
skip_trampoline_code.  Set solib_svr4_fetch_link_map_offsets to
svr4_lp64_fetch_link_map_offsets.
* sparc64obsd-tdep.c: Include "objfiles.h".  Don't include
"nbsd-tdep.h".
(sparc64obsd_init_abi): Set in_solib_call_trampoline and
skip_trampoline_code.  Set solib_svr4_fetch_link_map_offsets to
svr4_lp64_fetch_link_map_offsets.
* Makefile.in (sparc64nbsd-tdep.o, sparc64obsd-tdep.o): Update
dependencies.