[build] Assert is_host in golden_test.gni

This CL makes the golden_test template `assert(is_host)`. This would
have saved confusion recently, when a new golden test setup was not
working because the `($host_toolchain)` was missing.

Doing this required reorganizing call sites so that the golden_test
invocation is inside an `if (is_host)` block. Following the
recommendation of build folks, I've structured host-tool BUILD.gn files
to place most things in one big if-statement, with groups at the bottom
that redirect to $host_toolchain.

Change-Id: Id1e747d322ed5bcfa64060463ca8d91db9e1938a
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/513324
Commit-Queue: Mitchell Kember <mkember@google.com>
Reviewed-by: Ian McKellar <ianloic@google.com>
12 files changed
tree: d870f7bba3af6694caebddfdcf962f4250d834e0
  1. .clang-format
  2. .clang-tidy
  3. .git-blame-ignore-revs
  4. .gitattributes
  5. .gitignore
  6. .gn
  7. .style.yapf
  8. AUTHORS
  9. BUILD.gn
  10. CODE_OF_CONDUCT.md
  11. CONTRIBUTING.md
  12. LICENSE
  13. OWNERS
  14. PATENTS
  15. README.md
  16. boards/
  17. build/
  18. buildtools/
  19. bundles/
  20. docs/
  21. examples/
  22. garnet/
  23. products/
  24. rustfmt.toml
  25. scripts/
  26. sdk/
  27. src/
  28. third_party/
  29. tools/
  30. zircon/
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.

Read more about Fuchsia's principles.

How can I build and run Fuchsia?

See Getting Started.

Where can I learn more about Fuchsia?

See fuchsia.dev.