[ELF] Drive-by cleanup, make LTO.cpp clang-format clean.
[ELF] Drive-by cleanup, make LTO.cpp clang-format clean.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@264791 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld