Avoid using OutputSection::Sections. NFC.
Avoid using OutputSection::Sections. NFC.

We now used the InputSectionDescriptions in
OutputSectionCommand::finalize. This will allow moving
clearOutputSections earlier.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@304827 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld