At the moment all musl needs in addition to an official stage4 file is a few keywords and use flag changes. Change-Id: Ibf4a6d616aca1aef876967e2aa34170c96ac9ef8
Reorders the preinstall, making the order more explicit. Also dedupes some folder setup. Change-Id: I423dcba169558ff6037a3382b997675722e77405