[ELF] Remove redundant conversion of section content from ArrayRef to StringRef before calling the createSectionAtom() method and reverse conversion inside the method.
[ELF] Remove redundant conversion of section content from ArrayRef to
StringRef before calling the createSectionAtom() method and reverse
conversion inside the method.

No functional changes.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@206022 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld