tree-flow.h: Move some prototypes to gimple.h.

2013-10-10  Andrew MacLeod  <amacleod@redhat.com>

	* tree-flow.h: Move some prototypes to gimple.h.
	(gimple_fold_indirect_ref): Move prototype to gimple-fold.h.
	* gimple.h: Relocate some prototypes from tree-flow.h
	* builtins.c (std_gimplify_va_arg_expr, build_va_arg_indirect_ref):
	Move to gimplify.c.
	* gimplify.c (gimple_fold_indirect_ref): Move to gimple-fold.c.
	(build_va_arg_indirect_ref): Relocate and make static.
	(std_gimplify_va_arg_expr): Relocate here.
	* gimple-fold.c (gimple_fold_indirect_ref): Relocate here.
	* gimple-fold.h (gimple_fold_indirect_ref): Add prototype.

From-SVN: r203357