* tree.c (cp_valid_lang_attribute): New fn. Handle init_priority

	and com_interface.
	* cp-tree.h: Add prototype.
	* decl.c (init_decl_processing): Set valid_lang_attribute.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@26421 138bc75d-0d04-0410-961f-82ee72b054a4