8072732: Regression in configure due to JDK-8069057

Reviewed-by: erikj, tbell

common/autoconf/configure

@@ -28,8 +28,9 @@ if test "x$BASH_VERSION" = x; then
   exit 1
 fi
 
-# Force autoconf to use bash.
+# Force autoconf to use bash. This also means we must disable autoconf re-exec.
 export CONFIG_SHELL=$BASH
+export _as_can_reexec=no
 
 CONFIGURE_COMMAND_LINE="$@"
 conf_script_dir=`dirname $0`