This greatly reduces the amount of boilerplate in our tests. Reviewed By: #lld-macho, compnerd Differential Revision: https://reviews.llvm.org/D87960
Handle command-line option `-sectcreate SEG SECT FILE`, which inputs a binary blob from `FILE` into `SEG,SECT` Reviewed By: int3 Differential Revision: https://reviews.llvm.org/D85501