* c-pragma.c (push_alignment): Don't ignore alignments greater than
	4 bytes.
	(handle_pragma_token): Likewise.
	* c-pragma.c: Support for #pragma pack (push, <id>, <n>).
	(struct align_stack): Add id field.
	(push_alignment, pop_alignment): Take id parameter.
	(handle_pragma_token): Add necessary states.
	* c-pragma.h (enum pragma_state): Add necessary states.

From-SVN: r26662