Backport JDK-8186090: java.nio.Bits.unaligned() doesn't handle aarch64 #250
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Description
This fixes an issue that happened during the import of the aarch64 port from Icedtea due to different implementation of JDK-8158260:
IcedTea: http://icedtea.classpath.org/hg/icedtea8-forest/jdk/rev/bc6eab2038c6
JDK: http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/rev/6021c95f5944
This led to IcedTea skipping 8186090, but Corretto, which uses the JDK implementation for 8158260, needs it.
Related issues
java.nio.Bits.unaligned() doesn't handle aarch64
https://bugs.openjdk.java.net/browse/JDK-8186090
PPC64: unaligned Unsafe.getInt can lead to the generation of illegal instructions
https://bugs.openjdk.java.net/browse/JDK-8158260