ignore/types: add Bazel
ignore/types: add Bazel

`BUILD`, `WORKSPACE` are mentioned here:
https://docs.bazel.build/versions/master/build-ref.html

`*.bzl` is mentioned here:
https://docs.bazel.build/versions/master/skylark/concepts.html

PR #960 
BurntSushi/ripgrep,BurntSushi/ripgrep,BurntSushi/ripgrep,BurntSushi/ripgrep