This commit adds entries to the Rosetta Stones in
adoptopenjdk-bin/generate-sources.py and compilers/openjdk/8.nix, and
runs adoptopenjdk-bin/generate-sources.py to regenerate
adoptopenjdk-bin/sources.json.
With this commit, `nix-build . -A jdk8_headless` succeeds on
powerpc64le. Headless jdk is used as part of the build process for
many packages so this opens up access to them.
This reverts commit f2dfe8b9e6, reversing
changes made to e116aa1d4b.
The `openj9` attribute is missing for `jre` in case of `mac`. This missing
attribute is now blocking the channels from updating.
cc @bennofs
