i * gdb/configure.tgt (gdb_osabi): uclinux is like linux.

i	* gdb/configure.tgt (gdb_osabi): uclinux is like linux.
	* gdb/m68k-tdep.c (m68k_svr4_extract_return_value): Return value
	is never in %a0.
	(m68k_reg_struct_return_p): Duplicate gcc's struct mode algorithm.
	(m68k_svr4_return_value) Use VALUE_STRUCT_CONVENTION.  do not rely
	on %a0.
	(m68k_push_dummy_call): Force stack alignment.
	(m68k_svr4_init_abi): Set struct_return convention.
	(m68k_aout_init_abi): New.
	(m68k_gdbarch_init): Default to bare elf ABI that gcc provides.
	* gdb/m68k-tdep.h (m68k_aout_init_abi): Declare.
	* gdb/m68kbsd-tdep.c (m68kbsd_aout_init_abi): Use m68k_aout_init_abi.
	(m68kbsd_elf_init_abi): Add comment.
	* gdb/m68klinux-tdep.c (m68k_linux_init_abi): Just set the struct
	pointer register here.