hg: build-infra/jdk8: Corrected spelling mistake and moved openjdk-only check even earlier.

[erik.joelsson at oracle.com]

Changeset: 52c14058a460
Author:    erikj
Date:      2013-01-10 11:41 +0100
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/52c14058a460

Corrected spelling mistake and moved openjdk-only check even earlier.

! common/autoconf/configure.ac
! common/autoconf/generated-configure.sh
! common/autoconf/jdk-options.m4