This way, heirloom-devtools is only linked to a libc with a CDDL-compatible
license, making it fully redistributable. Heirloom yacc doesn't work properly
with musl libc, but luckily byacc can do its job just fine, so we only need
heirloom lex now.
Thanks to the more complete libc, and bash being available, heirloom's
bootstrap is significantly simplified.
Gábor Stefanik