Create parallel-libs subproject in LLVM

This initial commit just sets up the basic directory structure and includes the
charter document as README.rst to describe the purpose of the project.

llvm-svn: 273452
GitOrigin-RevId: d5f947968b4a124ec5eba5988f3f95ead789f640
1 file changed
tree: aa53b5c450999cf646a3c81ae1f1d4e08fb2d582
  1. README.rst