Microsoft.Diagnostics.Runtime 0.9.170809.3

This release marks .Net Native usage of the API as obsolete (specifically ClrFlavor.Native enum entry). This is a warning/heads up that future versions of ClrMD will strip support for .Net Native. The current .Net Native code will be refactored and placed into a new library parallel to ClrMD, the currently level of support is not disappearing, just moving out of Microsoft.Diagnostics.Runtime itself. Originally we intended to fully support .Net Native, but the level of support ended up being only for heap enumeration (as was needed in PerfView). Full support for .Net Native never came, and I'm using this as an opportunity to factor the code into a cleaner, smaller library. For now, this update ONLY marks ClrFlavor.Native obsolete as an FYI. No actual library changes were made and no functionality removed. You can discuss any questions or concerns here: https://github.com/Microsoft/clrmd/commit/c06a25d3bef8e7c43fdfded0906ac535134554f6