Refer to cl-lib rather than cl in lispref

* intro.texi (Lisp History):
* lists.texi (Sets And Lists): Refer to cl-lib rather than cl.

doc/lispref/ChangeLog

 2012-10-22  Glenn Morris  <rgm@gnu.org>
 
+	* intro.texi (Lisp History):
+	* lists.texi (Sets And Lists): Refer to cl-lib rather than cl.
 	* tips.texi (Coding Conventions): Recommend cl-lib over cl.
 
 2012-10-15  Chong Yidong  <cyd@gnu.org>

doc/lispref/intro.texi

@@ -119,7 +119,7 @@ worry about it; this manual is self-contained.
 
 @pindex cl
   A certain amount of Common Lisp emulation is available via the
-@file{cl} library.  @xref{Top,, Overview, cl, Common Lisp Extensions}.
+@file{cl-lib} library.  @xref{Top,, Overview, cl, Common Lisp Extensions}.
 
   Emacs Lisp is not at all influenced by Scheme; but the GNU project has
 an implementation of Scheme, called Guile.  We use it in all new GNU

doc/lispref/lists.texi

@@ -1266,7 +1266,7 @@ functions for sets include @code{memq} and @code{delq}, and their
 @quotation
 @b{Common Lisp note:} Common Lisp has functions @code{union} (which
 avoids duplicate elements) and @code{intersection} for set operations.
-Although standard GNU Emacs Lisp does not have them, the @file{cl}
+Although standard GNU Emacs Lisp does not have them, the @file{cl-lib}
 library provides versions.  @xref{Top,, Overview, cl, Common Lisp Extensions}.
 @end quotation