musl-toolchain: fix global lib paths (dont create /lib/libc.so)
musl-toolchain: fix global lib paths (dont create /lib/libc.so)

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