Pass the end of a component to SwiftAggLowering's enumerateComponents callback

This is usefull for determining whether components overlap.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@283932 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit ceb94e6d115bc8cce548b3d76f1fcf24f23421e6)
2 files changed