set vma on mach-o sections.

set vma on mach-o sections.

gas:

	* config/obj-macho.c (obj_mach_o_set_vma_data): New type.
	(obj_mach_o_set_section_vma): New.
	(obj_mach_o_post_relax_hook): New.
	* config/obj-macho.h (md_post_relax_hook): Define.
	(obj_mach_o_post_relax_hook): Declare.

gas/testsuite:

	* gas/mach-o/dysymtab-2.d: Update to include the set VMA.
	* gas/mach-o/symbols-1-64.d: Likewise.
	* gas/mach-o/symbols-1.d: Likewise.
	* gas/mach-o/symbols-6.d: Likewise.
	* gas/mach-o/zerofill-1.d: Likewise.
	* gas/mach-o/zerofill-2.d: Likewise.