gas/testsuite/

gas/testsuite/
	* gas/i386/x86-64-stack.s: Add cases for push segment register.
	* gas/i386/x86-64-stack.d: Updated.
	* gas/i386/x86-64-stack-suffix.d: Updated.
	* gas/i386/x86-64-stack-intel.d: Updated.
	* gas/i386/ilp32/x86-64-stack.d: Updated.
	* gas/i386/ilp32/x86-64-stack-suffix.d: Updated.
	* gas/i386/ilp32/x86-64-stack-intel.d: Updated.

opcodes/
	* i386-dis.c (print_insn): Print spaces between multiple excess
	prefixes.  Return actual number of excess prefixes consumed,
	not always one.

	* i386-dis.c (OP_REG): Ignore REX_B for segment register cases.