COFF: Make SectionChunk::Relocs field an ArrayRef. NFCI.

Differential Revision: https://reviews.llvm.org/D45714

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330172 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed