Provide standalone libc.a in self-contained for musl and wasi
Provide standalone libc.a in self-contained for musl and wasi

graydon/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust