RFR (S): 8229345: Memory leak due to vtable stubs not being shared on SPARC

[Hohensee, Paul]

Please review this backport to 8u.

Original JBS issue: https://bugs.openjdk.java.net/browse/JDK-8229345
Original changeset: https://hg.openjdk.java.net/jdk/jdk/rev/0a8407a78a2f
Webrev: http://cr.openjdk.java.net/~phh/8229345/webrev.8u.00/

The backport applied somewhat cleanly. The exceptions were adding 2019 copyright dates, the removal of the unsupported-in-8u globals_aarch64/arm/s390.hpp patches, and a slight difference in the vtableStubs.cpp patch due to 8u not acquiring the VtableStubs_lock.

Thanks,
Paul