[crashlog] Fix a mismatch between bytes and strings.
[crashlog] Fix a mismatch between bytes and strings.

The functions in read_plist() want bytes as input, not
strings.

<rdar://problem/52600712>

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@365416 91177308-0d34-0410-b5e6-96231b3b80d8

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