[librsvg: 7/9] configure: Replace AC_HELP_STRING with AS_HELP_STRING

[Marge Bot <marge-bot src gnome org>]

commit 8286fc162d9e59c5616e2d194055e78cf7074d3e
Author: Ismael Luceno <ismael iodev co uk>
Date:   Sat Sep 11 18:34:55 2021 +0200

    configure: Replace AC_HELP_STRING with AS_HELP_STRING
    
    AC_HELP_STRING is obsolete.
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/586>

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index 628092c3..3279c452 100644
--- a/configure.ac
+++ b/configure.ac
@@ -231,7 +231,7 @@ dnl Specify --enable-debug to make a development release.  By default,
 dnl we build in public release mode.
 
 AC_ARG_ENABLE(debug,
-              AC_HELP_STRING([--enable-debug],
+              AS_HELP_STRING([--enable-debug],
                              [Build Rust code with debugging information [default=no]]),
               [debug_release=$enableval],
              [AS_CASE(["$LIBRSVG_DEBUG"],