<rdar://problem/14262854>
<rdar://problem/14262854>

Match up with top’s implementation on recent Cab as API has changed a bit.
Tested the same binary running on Zin as well. Tested ARM binary on iOS as well.

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@185017 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb