Fix utility sub-type printing

The recent refactoring broke printing of utility-process sub-types. This
fixes that.

Add instructions for updating version checking

Add VersionCopy.h for release version checking

Increment version number from 1.50b to 1.51

Fix packaging script typo

Upgrade recommended xperf version to 17134 (April 2018)

Auto-install Fall Creators Update WPT

Increase version to 1.48 in preparation for new release

Updates for Windows 10 Creators Update

- Install the latest (10.0.15063.137) version of xperf/WPA
- Retire the automatic symbol stripping/downloading script
- Support the new thread naming API
- Update the version number
- Updating the packaging script so signing happens before copying

The symbol stripping/downloading API can be retired because the latest
WPA seems to properly download Chrome's symbols, and can convert them
in a timely manner.

Increase version to 1.46 in preparation for new release