Add back missing build test for kerberos

diff --git a/helpers/negotiate_auth/kerberos/config.test b/helpers/negotiate_auth/kerberos/config.test
new file mode 100755 (executable)
index 0000000..0054648
--- /dev/null
+++ b/helpers/negotiate_auth/kerberos/config.test
@@ -0,0 +1,6 @@
+#!/bin/sh
+# Don't build without gssapi.h
+if test -f /usr/include/gssapi/gssapi.h || test -f  /usr/include/gssapi.h ; then
+       exit 0
+fi
+exit 1