LLD patch: COFF: better behavior when using as a library

This applies de776439b61fb71c1256ad86238799c758c66048
from the LLVM git monorepo to the embedded LLD.
9ea23272faAndrew Kelley committed on 12/1/2017, 5:06:33 PMparent77b530b
6 files changedLine totals unavailable