[jdk17] RFR: 8269668: [aarch64] java.library.path not including /usr/lib64

[Severin Gehwolf]

This fix simplifies the `if` condition to use a default 64-bit library path including default setting when `_LP64` is defined (os has 64-bitness). This should be safe IMHO and seems better than explicitly enumerating all 64 bit Linux architectures.

This issue affects older releases and I'd like to get this fix into JDK 17. Thoughts?

-------------

Commit messages:
 - 8269668: [aarch64] java.library.path not including /usr/lib64

Changes: https://git.openjdk.java.net/jdk17/pull/200/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=200&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269668
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/200.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/200/head:pull/200

PR: https://git.openjdk.java.net/jdk17/pull/200