codemod TARGETS -> BUCK for fizz/compression

Summary:
Covers `fizz/backend`

The codemod is

```
$ find fbcode/fizz -name BUCK \
  | xargs -I{} sh -c 'if [[ -f $(dirname {})/TARGETS ]]; then hg rm {}; hg mv "$(dirname {})/TARGETS" {} && sed -i "s:^cpp_:fizz_cpp_:" {} && arc buildozer "new_load fbsource//xplat/fizz:defs.bzl fizz_cpp_library fizz_cpp_unittest" "$(dirname {}):__pkg__"; fi' \
  && arc f
```

Reviewed By: mingtaoy

Differential Revision: D67952832

fbshipit-source-id: 2ab3473e9266d147d9aba56d9eeff0537e912190