Refactor script into build and install portions (wikitext, 015e869)

Created 10/17/2007, updated 3/5/2024

snippets

Now we have a build script (which builds the ANTLR tool and the C target runtime on Darwin, and only the runtime on Linux) and a separate install script (which installs tool and runtime on Darwin, and only the runtime on Linux).

Signed-off-by: Greg Hurrell <greg@hurrell.net>