RFR (S) [11u backport]: 8207849: Allow the addition of more number to the Java version string

[Langer, Christoph]

Hi,

may I please get reviews for the backport of this issue to jdk11u.

Bug: https://bugs.openjdk.java.net/browse/JDK-8207849
Original Commit: http://hg.openjdk.java.net/jdk/jdk/rev/1edc62f9ba3a
Original review thread: https://mail.openjdk.java.net/pipermail/build-dev/2018-July/022719.html
Webrev: http://cr.openjdk.java.net/~clanger/webrevs/8207849.11u/

The patch did not apply cleanly, but only because in "make/autoconf/version-numbers" some version numbers have changed in the meanwhile and the apply tool did not find the right spot to insert the additional variables.

Thanks
Christoph