textproc/jalingo: pin to openjdk8
Java 9 and newer give an error:
[javac] /wrkdirs/usr/ports/textproc/jalingo/work/jalingo-0.6.0-src/src/ja/centre/util/io/nio/MappedByteBufferWrapper.java:106: error: cannot find symbol
[javac] sun.misc.Cleaner cleaner = (sun.misc.Cleaner) cleanerMethod.invoke( buffer );
Deprecate as last release was in 2006.
PR: 291631