java/openjdk8: (aarch64) builds fine with llvm from base

ran poudriere on FreeBSD 13.3/14.0/14.1/15.0
all failing ports mentioned in the issue are building fine now:
benchmarks/scimark2
devel/tijmp
sysutils/javaservicewrapper
www/jericho-html

PR: 264065
Differential Revision: https://reviews.freebsd.org/D46500