Don't allow mixing x64_32 with x86_64.

Don't allow mixing x64_32 with x86_64.

bfd/

2011-01-03  H.J. Lu  <hongjiu.lu@intel.com>

	* cpu-i386.c (bfd_i386_compatible): New.
	(bfd_x64_32_arch_intel_syntax): Replace bfd_default_compatible
	with bfd_i386_compatible.
	(bfd_x86_64_arch_intel_syntax): Likewise.
	(bfd_i386_arch_intel_syntax): Likewise.
	(i8086_arch): Likewise.
	(bfd_x64_32_arch): Likewise.
	(bfd_x86_64_arch): Likewise.
	(bfd_i386_arch): Likewise.

ld/testsuite/

2011-01-03  H.J. Lu  <hongjiu.lu@intel.com>

	* ld-x86-64/dummy.s: New.
	* ld-x86-64/foo.s: Likewise.
	* ld-x86-64/ia32-1.d: Likewise.
	* ld-x86-64/ia32-2.d: Likewise.
	* ld-x86-64/ia32-3.d: Likewise.
	* ld-x86-64/ilp32-1.d: Likewise.
	* ld-x86-64/ilp32-2.d: Likewise.
	* ld-x86-64/ilp32-3.d: Likewise.
	* ld-x86-64/lp64-1.d: Likewise.
	* ld-x86-64/lp64-2.d: Likewise.
	* ld-x86-64/lp64-3.d: Likewise.
	* ld-x86-64/start.s: Likewise.

	* ld-x86-64/x86-64.exp: Run ilp32-1, ilp32-2, ilp32-3, ia32-1,
	ia32-2, ia32-3, lp64-1, lp64-2 and lp64-3.