[PATCH] tools/configure.ac: Replace macro AC_HELP_STRING

[Michal Orzel <michal.orzel@xxxxxxx>]

... with AS_HELP_STRING as the former is obsolete according
to GNU autoconf 2.67 documentation.

Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>
---
 tools/configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/configure.ac b/tools/configure.ac
index 5a4fb9022d..f29c319b42 100644
--- a/tools/configure.ac
+++ b/tools/configure.ac
@@ -215,7 +215,7 @@ AC_SUBST(qemu_xen_path)
 AC_SUBST(qemu_xen_systemd)
 
 AC_ARG_WITH([stubdom-qmp-proxy],
-    AC_HELP_STRING([--stubdom-qmp-proxy@<:@=PATH@:>@],
+    AS_HELP_STRING([--stubdom-qmp-proxy@<:@=PATH@:>@],
         [Use supplied binary PATH as a QMP proxy into stubdomain]),[
     stubdom_qmp_proxy="$withval"
 ],[
-- 
2.29.0