TruffleRuby - GraalVM Community Edition 1.0 RC11

New features:

• macOS clocks CLOCK_MONOTONIC_RAW, _MONOTONIC_RAW_APPROX, _UPTIME_RAW,
  _UPTIME_RAW_APPROX, and _PROCESS_CPUTIME_ID have been implemented (#1480).
• TruffleRuby now automatically detects native access and threading permissions
  from the Context API, and can run code with no permissions given (Context.create()).

Bug fixes:

• FFI::Pointer now does the correct range checks for signed and unsigned values.
• Allow signal 0 to be used with Process.kill (#1474).
• IO#dup now properly sets the new IO instance to be close-on-exec.
• IO#reopen now properly resets the receiver to be close-on-exec.
• StringIO#set_encoding no longer raises an exception if the underlying
  String is frozen (#1473).
• Fix handling of Symbol encodings in Marshal#dump and Marshal#load (#1530).

Compatibility:

• Implemented Dir.each_child.
• Adding missing support for the close_others option to exec and spawn.
• Implemented the missing MatchData#named_captures method (#1512).

Changes:

• Process::CLOCK_ constants have been given the same value as in standard
  Ruby.

Performance:

• Sped up accesses to native memory through FFI::Pointer.
• All core files now make use of frozen String literals, reducing the number
  of String allocations for core methods.
• New -Xclone.disable option to disable all manual cloning.