[gn][banjo] Fix some signedness comparison warnings in gn host build

This ends up being a lot of ugly casts, but attempting to change the
string indices to size_t was not clearly correct in all cases either. So
this is just getting rid of warnings while avoiding changing behaviour
in code the might be abandoned in the near future anyway.

ZX-3415 #comment [gn][banjo] Fix some signedness comparison warnings in gn host build

Test: CQ
Change-Id: Ie49031cb89ea36f9a76fdbc2d1a843209d0be8fc
4 files changed
tree: f4e4353fca1f9858f1cb6f42be5ae70ef8d12300
  1. boards/
  2. build/
  3. buildtools/
  4. bundles/
  5. docs/
  6. garnet/
  7. peridot/
  8. products/
  9. scripts/
  10. sdk/
  11. src/
  12. zircon/
  13. .clang-format
  14. .dir-locals.el
  15. .gitattributes
  16. .gitignore
  17. AUTHORS
  18. CODE_OF_CONDUCT.md
  19. CONTRIBUTING.md
  20. LICENSE
  21. OWNERS
  22. PATENTS
  23. README.md
  24. rustfmt.toml
README.md

Fuchsia

Pink + Purple == Fuchsia (a new operating system)

What is Fuchsia?

Fuchsia is a modular, capability-based operating system. Fuchsia runs on modern 64-bit Intel and ARM processors.

Fuchsia is an open source project with a code of conduct that we expect everyone who interacts with the project to respect.

How can I build and run Fuchsia?

See Getting Started.

Where can I learn more about Fuchsia?

See the documentation.