Constify atom name strings

Changes MakeAtom to take a const char * and NameForAtom to return them,
since many callers pass pointers to constant strings stored in read-only
ELF sections.   Updates in-tree callers as necessary to clear const
mismatch warnings introduced by this change.

Signed-off-by: Alan Coopersmith <alan.coopersmith@sun.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>

xfixes/cursor.c

@@ -457,7 +457,7 @@ ProcXFixesGetCursorName (ClientPtr client)
     CursorPtr			pCursor;
     xXFixesGetCursorNameReply	reply;
     REQUEST(xXFixesGetCursorNameReq);
-    char *str;
+    const char *str;
     int len;
 
     REQUEST_SIZE_MATCH(xXFixesGetCursorNameReq);
@@ -507,7 +507,7 @@ ProcXFixesGetCursorImageAndName (ClientPtr client)
     CursorPtr			pCursor;
     CARD32			*image;
     int				npixels;
-    char			*name;
+    const char			*name;
     int				nbytes, nbytesRound;
     int				width, height;
     int				rc, x, y;