libctf: don't include cv-quals or pointers in the name table

libctf: don't include cv-quals or pointers in the name table

Even if these types have a name recorded against them, we should
ignore it.  They don't have names, full stop.

libctf/ChangeLog:
	* ctf-open.c (init_static_types): Drop nameless types when sizing
	the name table.
	(init_static_types_names_internal): Never pass in their name.