* i386obsd-tdep.c: Include "regset.h", "gdb_assert.h" and

* i386obsd-tdep.c: Include "regset.h", "gdb_assert.h" and
"gdb_string.h".
(i386obsd_r_reg_offset): New variable.
(i386obsd_aout_supply_regset)
(i386obsd_aout_regset_from_core_section): New functions.
(i386obsd_supply_reg, fetch_core_registers): Remove functions.
(i286obsd_core_fns): Remove variable.
(i386obsd_init_abi): Initialize TDEP->gregset_reg_offset,
TDEP->gregset_num_regs and TDEP->sizeof_gregset.  Set
regset_from_core_section.  Use ARRAY_SIZE to initialize
TDEP->sc_num_regs.
(_initialize_i386obsd_tdep): Don't call add_core_fns.