tools: Regenerate autoconf

This seems to have been omitted in many recent commits.  The earliest
of which are, according to git-bisect:
  154137dfdb  stubdom/configure      stubdom: add xenstore pvh stubdom
  cc83ee4c6c  all configure scripts  NetBSD: Fix lock directory path
but it seems that this is true of several later commits too.

Release status: I consider this discrepancy a release critical bug.

Signed-off-by: Ian Jackson <iwj@xenproject.org>
Release-acked-by: Ian Jackson <iwj@xenproject.org>

stubdom/configure

@@ -690,7 +690,7 @@ enable_c_stubdom
 enable_caml_stubdom
 enable_pv_grub
 enable_xenstore_stubdom
-enable_xenstore_pvh_stubdom
+enable_xenstorepvh_stubdom
 enable_vtpm_stubdom
 enable_vtpmmgr_stubdom
 enable_qemu_traditional
@@ -2184,8 +2184,8 @@ fi
 
 
 # Check whether --enable-xenstorepvh-stubdom was given.
-if test "${enable_xenstore_pvh_stubdom+set}" = set; then :
-  enableval=$enable_xenstore_pvh_stubdom;
+if test "${enable_xenstorepvh_stubdom+set}" = set; then :
+  enableval=$enable_xenstorepvh_stubdom;
 
 if test "x$enableval" = "xyes"; then :