[fidl] Fix some nondeterministic code generation

(And a flaky test)

Test: Added a (deterministically) broken test and fixed it.

Change-Id: Ic16eb0baeb611cc6180e2ca3cc18611eceedfebb

[git] Ignore /public/fidl.

It will soon host generated GN rules for FIDL libraries.

BLD-16

Change-Id: I32887ae0a2bdca9580cb9d2b5f4628fb525fdb06

[git] Add .gitignore for CLion usage in zircon/

Change-Id: I04a68ad9c265af7b2519e4b5b33d31d8d9140df8

[gn] Ignore one more directory with generated GN files.

Change-Id: I8da227d3e18eeadd417a4bd99d176e36cd871923

[gn] Reserve directory for host tools.

TO-733

Change-Id: I5b61eb3fd01335441c376c191ab90c4a176a1963

[build] Add documentation for the generation of GN build files.

TO-562

Change-Id: I159ee8ae73d05bbf42c3e64238b16ab82e2e634f

[build] Ignore the directory hosting GN rules.

These rules are locally generated by GN and should not be checked in.

Change-Id: I5075a845328faa0df358457bcaf612832c76a1f3

Initial update of README.md and .gitignore

Change-Id: I6c12fb5c5692cca11f3abe53f0fda0b545b40396

[root] Add .vscode to .gitignore

Change-Id: I6762d3035a82f84be3c1731c8ffaaf50eee0fba8

[git] Ignore .swo files.

In addition to ignoring VIM .swp files, also ignore VIM .swo files
(swo files show up if you have a file open for edit in two instances
instances of VIM concurrently)

Change-Id: If96320ee3982fba46c827fe7e9d4537e8ce9c9a2

[docs] Instructions for YouCompleteMe integration

Ignore compile_commands.json files, which contain the compilation
database used by YCM.

Change-Id: Ibca193c35a981d9a301a2f6f97d47bcffb543a72

[infra] Ignore magenta benchmarks directory.

Since the benchmarks directory is a separate repository, it should be ignored
by the magenta repository.

Change-Id: I1979eee145fc281ddc6b9b2f116b26e0cb0d029e

[infra] Provide configuration for infra services

Change-Id: Ia107bd38c81874d43169b575397ed248a14111e3

[scripts] Add a script for running static analyzer

We have some magenta-specific atatic analyzers that verify
the correct usage of locks such as mutexes and spinlocks. These
analyzers maybe extended in the future. To run the analyzers, we
need to be able to build magenta with Clang. This patch provides
a simple script to run the existing analyzers on magenta.

Change-Id: I608186f34660379e105f984b6550eda1d4a482c3

[git] Correctly .gitignore the prebuilt downloads

/prebuilt/downloads/* and /prebuilt/downloads/ have different behavior
w/r/t git clean -fd. The former causes the prebuilt directory to be
wiped out. The latter preservers it. The -x flag to git clean forces the
first behavior in case we need it for bots or some such.

Change-Id: Ica37d6e261d3f8d21a46671b7b285f3496a4bd66

Add .DS_Store to gitignore

Change-Id: Ib0cb8ad474f4d7499e75d80a74bbbb384ef1657c

Add config.mk.bak to gitignore

Change-Id: I148188de68eeeef9022fcc4867bb15f42fed23c3

[build][scripts] improvements to download-toolchain

* sets the toolchain prefix automatically
* change the download location to magenta/prebuilt/...
* store the version SHAs in this repo instead of inferring them from the
toolchain repo
* no longer depends on the toolchain repo at all (and thus no longer
depends on checking out with jiri)

Change-Id: I650456e83ea204bf8aac06341283958cb244b7d5

[gn] Remove GN refs from documents and gitignore

Change-Id: Idffc0684580069843bc9bdc4fd3867b98bb35175

[scripts] add the tagit script back, which got dropped from repo move

Looks like an old .gitignore line made it fall out of the transfer.
Remove that line.

Change-Id: I6c6efbbfb82b99f521dbdecc41988a88dfdf08d1

[magenta] Initial commit