localename: Update comments

[Bruno Haible]

FreeBSD also has uselocale() et al, since version 9.1, see
https://www.freebsd.org/releases/9.1R/relnotes.html
https://svnweb.freebsd.org/base?view=revision&revision=235785
https://svnweb.freebsd.org/base?view=revision&revision=227753

And AIX 7 as well.


2018-12-16  Bruno Haible  <address@hidden>

        localename: Update comments.
        * lib/localename.c (HAVE_USELOCALE): Update list of platforms.

diff --git a/lib/localename.c b/lib/localename.c
index 3fddbf9..aa3cc13 100644
--- a/lib/localename.c
+++ b/lib/localename.c
@@ -2623,7 +2623,8 @@ get_lcid (const char *locale_name)
 #endif
 
 
-#if HAVE_USELOCALE /* glibc, Mac OS X, Solaris 11 OpenIndiana, or Solaris >= 
11.4  */
+#if HAVE_USELOCALE /* glibc, Mac OS X, FreeBSD >= 9.1, AIX >= 7,
+                      Solaris 11 OpenIndiana, or Solaris >= 11.4  */
 
 /* Simple hash set of strings.  We don't want to drag in lots of hash table
    code here.  */