Move clearOutputSections earlier.
Move clearOutputSections earlier.

Now removeUnusedSyntheticSections operates entirely on the linker
script.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@307043 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld