LLVM notes
----------

This directory contains the Google Benchmark source code with some unnecessary
files removed. Note that this directory is under a different license than
libc++.

Changes:
* https://github.com/google/benchmark/commit/4abdfbb802d1b514703223f5f852ce4a507d32d2
  is applied on top of
  https://github.com/google/benchmark/commit/4528c76b718acc9b57956f63069c699ae21edcab
  to add RISC-V timer support.
* https://github.com/google/benchmark/commit/8e48105d465c586068dd8e248fe75a8971c6ba3a
  is applied on top of
  https://github.com/google/benchmark/commit/4528c76b718acc9b57956f63069c699ae21edcab
  to fix cross-build from linux to windows via MinGW.