Add Bazel based build
Bazel is one of the build system used in the modern software world and especually in ML OSS projects. Support for Bazel build would allow simpler intergration into such frameworks.
Currently supported:
- Build microkernels with required CPU micro-architecture
- Combine into common library (matmul)
- Tests compilation and execution
Signed-off-by: Anton Bondarenko anton.bondarenko@arm.com