llvm-project

7ce6a94c - [libc++] Add a script to produce benchmarks for LNT (#175594)

[libc++] Add a script to produce benchmarks for LNT (#175594) This patch adds a script to run a subset of libc++'s benchmarks for uploading to LNT. As part of this patch the test-at-commit script is modified to no longer build the library itself. Indeed, this provides the necessary flexibility to run the test suite multiple times on the same built library, and also addresses previous concerns where test-at-commit couldn't customize how the library is being built.