Simplify the logic to avoid the Closed set.
Simplify the logic to avoid the Closed set.

IMHO this makes the code easier to read: at each iteration we add
a section to a PT_LOAD and increase its size.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@252011 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld