Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

This requires some nefarious use of rustup and the funky rustup command
line comes courtesy of <https://dentrassi.de/2020/06/17/headless-installation-of-cargo-and-rust/>

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

Rather than using and rpm(8) and grep(1) to find the location to store
the libclang_rt.builtins-wasm32.a file use clangs -print-runtime-dir
option and strip the last component.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

The wasi-sysroot is now packaged by Fedora in the wasi-libc-devel &
wasi-libc-static packages (just installing wasi-libc-devel should bring
in the other if needed).

We also no longer need bindgen-cli as we are building the rust stuff
from within the build.rs files.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

Requested-by: Liam Crilly <liam@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

We have builds triggered on Makefile changes and shared.mk is included
in the Makefile.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

We have switched the repository from the preview to master branch ready
for its initial release.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

libunit-wasm and example C and Rust WebAssembly modules for NGINX Unit.

Co-developed-by: Timo Stark <t.stark@nginx.com>
Co-developed-by: Liam Crilly <liam@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>