configure cleanups:

call libtoolize to avoid the ltconfig warning

don't call autoheader since we're not using config.h

remove superfluous AC_SUBST(CC) and AC_PROG_RANLIB()

.cvsignore updates for the autogenerated/installed files


git-svn-id: http://svn.xiph.org/trunk/ao@862 0101bb08-14d6-0310-b084-bc0e0c8e3800