Since clang modifies .o files in place, use MAP_PRIVATE as it seems to fix the issues we run into on darwin even though the docs don't seems to say it will.
Since clang modifies .o files in place, use MAP_PRIVATE as it seems
to fix the issues we run into on darwin even though the docs don't
seems to say it will.



git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@147835 91177308-0d34-0410-b5e6-96231b3b80d8

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