Revert "[zircon/fuchsia][config] Remove -Wthread-safety flag"

This reverts commit cd64fec65e5fc4a042446332966d5a6230c5d2e7.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> [zircon/fuchsia][config] Remove -Wthread-safety flag
> 
> This flag is already added through -Wall, and removing it will hamonize
> the GN/ZN compilation flags.
> 
> Bug: 3203
> Change-Id: I6be5acf0834f5343f38cb2fb798a47a09e2c2ba9

TBR=phosek@google.com,mcgrathr@google.com,leonardchan@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Similar to fxr/329550, this flag is not enabled as a part of Wall and Wextra, so we should still keep it.

Bug: 3203
Change-Id: I2b3ac248c06b154b8a45be1fa9fd6a49011480cd
2 files changed
tree: aa89a35b0a99b2ff8c25b01cc0ef5f6dac43e962
  1. boards/
  2. build/
  3. bundles/
  4. docs/
  5. examples/
  6. garnet/
  7. peridot/
  8. products/
  9. scripts/
  10. sdk/
  11. src/
  12. third_party/
  13. tools/
  14. zircon/
  15. .clang-format
  16. .clang-tidy
  17. .dir-locals.el
  18. .gitattributes
  19. .gitignore
  20. .gn
  21. .style.yapf
  22. AUTHORS
  23. BUILD.gn
  24. CODE_OF_CONDUCT.md
  25. CONTRIBUTING.md
  26. LICENSE
  27. OWNERS
  28. PATENTS
  29. README.md
  30. 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 fuchsia.dev.