Changes since 0.7
- Do not depend on gcc or libgcc install
- Fix default key logic in urls attribute
- Properly handle system paths for LLVM distribution
- Fix use of absolute paths with sysroots
- Support for Pop!_OS and RHEL in LLVM fetch logic
- Small code and documentation cleanups
- Fix support for Bazel 4.2
- Support for LLVM 14
- Minor bug fixes