feat(common): support -- for build scripts

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!