only define soname-flag and version-script-flag for openjdk builds
only define soname-flag and version-script-flag for openjdk builds

These flags are only needed to ensure that libjvm.so can be used as a
drop-in replacement for OpenJDK's VM, and that only makes sense for
openjdk builds (without the openjdk-src option).  It didn't hurt
anything to define them unconditionally, but it was misleading.

bgould/avian,joshuawarner32/avian,dicej/avian,bgould/avian,joshuawarner32/avian,bigfatbrowncat/avian-pack.avian,ucdseniordesign/avian,lwahlmeier/avian,joshuawarner32/avian,bgould/avian,bigfatbrowncat/avian-pack.avian,marcinolawski/avian,lostdj/avian,MaartenR/avian,ucdseniordesign/avian,dicej/avian,lwahlmeier/avian,lwahlmeier/avian,marcinolawski/avian,MaartenR/avian,minor-jason/avian,marcinolawski/avian,minor-jason/avian,lostdj/avian,bgould/avian,lwahlmeier/avian,lostdj/avian,ucdseniordesign/avian,joshuawarner32/avian,bigfatbrowncat/avian-pack.avian,lostdj/avian,MaartenR/avian,MaartenR/avian,marcinolawski/avian,dicej/avian,minor-jason/avian,bigfatbrowncat/avian-pack.avian,minor-jason/avian,ucdseniordesign/avian,dicej/avian