LLVM: Update to version 15.0.5. * src/llvm.mk: Update version and checksum. Download and extract tarball with cmake files. Disable building benchmarks. Use two spaces for indentation. Adjust for library name containing version suffix now.

#!/bin/bash
## bootstrap script
## Run this to generate the configure script

set -e      # halt if unhandled error
aclocal
autoconf    # generate configure script