Revert "[zircon] [gn] Convert convenience scripts to use GN build"

This reverts commit d194636b0ac659e19b6ced7ba2c9499b807144c5.

Reason for revert: Landed accidentally via topic/CQ snafu!

Original change's description:
> [zircon] [gn] Convert convenience scripts to use GN build
> 
> The obsolete scripts build-all-zircon, make-parallel, and
> make-release are gone entirely.  The build-zircon script is
> updated to drive the GN+Ninja build using approximately the
> same command line UI.  The buildall script is updated to use
> build-zircon.  The run-zircon script is updated to default to
> the new locations used by build-zircon.
> 
> Bug: BLD-325
> Test: ./scripts/run-zircon-x64
> Change-Id: I4c8b71a804ef81b71bd535e6bdef28e683f22450

TBR=kulakowski@google.com,mcgrathr@google.com,juliehockett@google.com

Change-Id: I4add440a0e3229ed615042392ee9bbeb306dd17f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: BLD-325
7 files changed
tree: 80d7b7e3a7f234a897955504dc05d37a8f6636d9
  1. .cargo/
  2. boards/
  3. build/
  4. buildtools/
  5. bundles/
  6. docs/
  7. garnet/
  8. peridot/
  9. products/
  10. scripts/
  11. sdk/
  12. src/
  13. zircon/
  14. .clang-format
  15. .dir-locals.el
  16. .gitattributes
  17. .gitignore
  18. .gn
  19. AUTHORS
  20. CODE_OF_CONDUCT.md
  21. CONTRIBUTING.md
  22. LICENSE
  23. OWNERS
  24. PATENTS
  25. README.md
  26. 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.