JDK-8266749 contained a Windows/AArch64 specific include file that was skipped when the patch was backported to JDK 11u (
https://bugs.openjdk.java.net/browse/JDK-8271571) However, the missing file is necessary to build JDK 11u for this new platform. This patch will be a part of the Windows/AArch64 port PR.