tree fb0ea90b123781b0bcead6b164640b138bbc1252
parent e45012bfb94caf156e41b4eab6b76c834dcf4692
author jcater <jcater@google.com> 1615812773 -0700
committer Copybara-Service <copybara-worker@google.com> 1615812847 -0700

Update Java-related toolchains to enable the toolchain transition.

This means that Java toolchains will no longer always be in the host configuration, but can use target and exec transitions.

See https://github.com/bazelbuild/proposals/blob/master/designs/2019-02-12-toolchain-transitions.md for details about the new capabilities, and https://github.com/bazelbuild/proposals/blob/master/designs/2020-02-07-toolchain-transition-migration.md for details about the migration.

Note that the `incompatible_use_toolchain_transition` is intended to be removed once the migration has completed. A similar change will be sent at that point to remove it.

TESTED: Downstream Bazel tests: https://buildkite.com/bazel/bazel-at-head-plus-downstream/builds/1951 (rules_haskell failed in the nightly, rules_foreign_cc is broken due to a recent commit, neither is related)
PiperOrigin-RevId: 362921879