gbl: add stricter lints to libbootimg

No functional changes, just documentation and BUILD file formatting
using `buildify`.

Bug: b/349644417
Change-Id: I14871f29a6c7bd586f3e11be705f595da17a4eca
2 files changed
tree: 9558d7047fd9043f0b5b58d0f7bb547ef390afd0
  1. gbl/
  2. libxbc/
  3. vts/
  4. .clang-format
  5. .gitignore
  6. BUILD
  7. LICENSE
  8. OWNERS