RFR: JDK-8176099 --with-build-jdk and --with-boot-jdk not working with JDK 10

Fri Sep 15 12:20:01 UTC 2017

The code in configure that validates build and boot JDK does not accept 
the JDK 10 version string.

For build JDK, the version string must exactly match 10 (if built 
automatically, it will match the current source exactly). For boot JDK I 
just added JDK 10 as an additional allowed version, but did not (at this 
point) block usage of JDK 8. While it is recommended to use version N-1 
to build JDK version N, I don't see a good reason at this time to block, 
at configure time, the use of JDK 8 to build JDK 10.

The intention is to push this once the consolidated forest is open.

Bug: https://bugs.openjdk.java.net/browse/JDK-8176099
WebRev: 
http://cr.openjdk.java.net/~ihse/JDK-8176099-fix-boot-build-jdk-for-jdk10/webrev.01

/Magnus