Rename gimple_asm_input_p to gimple_asm_basic_p

Rename gimple_asm_input_p to gimple_asm_basic_p

Following on from the earlier tree rename, this patch renames
gimple_asm_input_p to gimple_asm_basic_p, and similarly for
related names.

gcc/
	* doc/gimple.texi (gimple_asm_basic_p): Document.
	(gimple_asm_set_basic): Likewise.
	* gimple.h (GF_ASM_INPUT): Rename to...
	(GF_ASM_BASIC): ...this.
	(gimple_asm_set_input): Rename to...
	(gimple_asm_set_basic): ...this.
	(gimple_asm_input_p): Rename to...
	(gimple_asm_basic_p): ...this.
	* cfgexpand.cc (expand_asm_stmt): Update after above renaming.
	* gimple.cc (gimple_asm_clobbers_memory_p): Likewise.
	* gimplify.cc (gimplify_asm_expr): Likewise.
	* ipa-icf-gimple.cc (func_checker::compare_gimple_asm): Likewise.
	* tree-cfg.cc (stmt_can_terminate_bb_p): Likewise.