Allows use of `./build.sh configure -- --param-one=foo ...`.
Updates Core build to support `--` (including build.bat wrapper for
Windows builds). Fixes Linux debian rules to pass additional
parameters in with this format again, and adds `:arch` to only build
current architecture, not wasm as well...
Note that when using `--` you should typically avoid multiple actions in
a single command, as each action may interpret the additional parameters
differently!
Refactoring of build.sh to use the builder_ functions. The script should
now be a lot cleaner. Usage is available with `core/build.sh --help`
Targets are :x86, :x64, :wasm, :arch (linux/mac).
Supports additional requirements of Linux build (--target-path,
--configure).
By default will attempt to build all available targets.
Actions are: clean, configure, build, test, install, uninstall.
The install and uninstall actions only work for linux and mac targets at
present.
