[lldb] [lit] Un-XFAIL Register/x86-64-read.test for Darwin
[lldb] [lit] Un-XFAIL Register/x86-64-read.test for Darwin

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@359221 91177308-0d34-0410-b5e6-96231b3b80d8

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