jdk11u builds for the Windows AArch64 are failing. More specifically, running "make CONF=windows-aarch64-normal-server-release product-images" results in this error:

make[4]: *** No rule to make target '/cygdrive/d/java/forks/openjdk/jdk11u-dev/build/windows-aarch64-normal-server-release/buildjdk/support/gensrc/java.base/windows/conf/tzmappings', needed by '/cygdrive/d/java/forks/openjdk/jdk11u-dev/build/windows-aarch64-normal-server-release/buildjdk/support/modules_libs/java.base/tzmappings'. Stop.

The target in question was introduced by https://github.com/openjdk/jdk11u-dev/commit/6dc07120621fea758164bc9a969179556061ab8b