openssh: explicitly disable arc4random_stir

This was dropped from the import library on newer Cygwin, but was still
present in 3.3, resulting in a build failure on 32-bit.

openssh/PKGBUILD

@@ -2,7 +2,7 @@
 
 pkgname=openssh
 pkgver=10.0p1
-pkgrel=3
+pkgrel=4
 pkgdesc='Free version of the SSH connectivity tools'
 url='https://www.openssh.com/portable.html'
 msys2_changelog_url="https://www.openssh.com/releasenotes.html"
@@ -42,6 +42,9 @@ build() {
   # setproctitle is new in Cygwin 3.6, and we want openssh
   # to work with older Cygwin versions too.
   export ac_cv_func_setproctitle=no
+  # configure might detect arc4random_stir stub in older
+  # Cygwin versions, which is not in header
+  export ac_cv_func_arc4random_stir=no
 
   export MSYSTEM=CYGWIN
   TEST_SSH_UTF8=no \