Please review a very small fix: http://cr.openjdk.java.net/~iklam/jdk9/8145271-standalone-hotspot-build/
Bug: stand-alone hotspot build is broken https://bugs.openjdk.java.net/browse/JDK-8145271 Summary of fix: This was broken by the recent JDK version changes. The fix is to add "export" to variables such as VERSION_MAJOR so that they can be inherited by "make" sub processes. Tests: JPRT Thanks - Ioi
