* builtins.c (check_for_builtin):  New function.
	(build_call_or_builtin):  Remove.
	* java-tree.h:  Update accordingly.
	* expr.c (expand_invoke):  Use build + check_for_builtin instead
	of build_call_or_builtin.
	* parse.y (patch_invoke):  Likewise.  This avoids needlessly creating
	a new CALL_EXPR node, which means we don't lose the CALL_USING_SUPER
	flag (which had caused jcf-write to incorrectly emit invokevirtual).

From-SVN: r49909