RFR: JDK-8035825 Warn instead of fail when calling the configure wrapper directly

Wed Feb 26 12:16:18 UTC 2014

This is a follow-up to JDK-8035495 (Improvements in autoconf 
integration). It turned out that some of our internal systems are still 
calling the configure wrapper (common/autoconf/configure) directly, 
instead of the top-level script.

This will change the wrapper so that such usage gets a warning, but not 
fail, giving those users time to transition to calling the top-level 
entry point instead.

Bug: https://bugs.openjdk.java.net/browse/JDK-8035825
WebRev: 
http://cr.openjdk.java.net/~ihse/JDK-8035825-warn-not-fail-when-calling-configure-wrapper/webrev.01

/Magnus