Add Intel MCU support to bfd

Add Intel MCU support to bfd

bfd/

	* Makefile.am (ALL_MACHINES): Add cpu-iamcu.lo.
	(ALL_MACHINES_CFILES): Likewise.
	* archures.c (bfd_mach_iamcu): New.
	(bfd_mach_i386_iamcu): Likewise.
	(bfd_mach_i386_iamcu_intel_syntax): Likewise.
	(bfd_iamcu_arch): Likewise.
	(bfd_archures_list): Add &bfd_iamcu_arch.
	* config.bfd (targ_selvecs): Add iamcu_elf32_vec to
	i386_elf32_vec.
	(targ_archs): Add bfd_iamcu_arch if needed.
	* configure.ac: Support iamcu_elf32_vec.
	* cpu-iamcu.c: New file.
	* elf32-i386.c (elf32_iamcu_elf_object_p): New function.
	Add support for iamcu_elf32_vec and elf32_iamcu_bed.
	* targets.c (iamcu_elf32_vec): New.
	(_bfd_target_vector): Add iamcu_elf32_vec.
	* Makefile.in: Regenerated.
	* bfd-in2.h: Likewise.
	* configure: Likewise.

binutils/testsuite/

	* binutils-all/objdump.exp (cpus_expected): Append iamcu.