Baseline: a991db7c

Cherry picks:

   + 0d14ec84:
     Release 3.7.0 (2020-10-20)
   + d563446a:
     Add `-XDcompilePolicy=simple` to default javacopts
   + 6336264e:
     Update rules_cc reference to head of rules_cc as of 2020-11-11.
   + b3f93468:
     Bump rules_cc to support llvm 11.0.0 clang-cl compiler on Windows
   + e055b433:
     Remove accidentally re-added
     tools/jdk/java_toolchain_default.bzl.
   + 02838a1b:
     Avoid the spawn cache if executing dynamically.
   + d0efd7b9:
     Release 3.7.1 (2020-11-24)
   + a689d673:
     Use getRunfilesPath for run_under executable path generation.
     getRootRelativePath doesn't return a valid runfiles path for
     external source files anymore after the recent external source
     root change. Also, it won't work for external labels either once
     the --nolegacy_external_runfiles becomes default. This fixes
     issue #12545.

Important changes:

  - Update rules_cc to commit b1c40e1de81913a3c40e5948f78719c28152486d

This release contains contributions from many people at Google, as well as William A Rowe Jr.