Merge branch 'v8'

[vcpkg] Refactor Commands: Part 1 (microsoft#12585)

* Rename commands.exportifw.cpp -> export.ifw.cpp

* move DryRun from commands.h -> commands.interface.h

* move vcpkgcmdarguments and vcpkgpaths over to commands.interface.h

* move vcpkg::Commands::BuildExternal -> commands.buildexternal.h

* add commands.*.h for the commands.*.cpp

* move vcpkg::Commands::* to commands.*.h

* move vcpkg::Commands::{Hash,Fetch} to their own files

* change include commands.h -> commands.*.h in commands.*.cpp

* remove commands.*.h from commands.h

* join vcpkg::Commands::* into one namespace line

* fix vcxproj build

[CHANGELOG] Update to 2020.06.15 (microsoft#11977)

VCPKG April Update

VCPKG January Update

Remove vtk:x64-linux result in baseline (microsoft#9389)

* Remove vtk:x64-linux=fail from baseline

* trigger CI test

[ppconsul] Upgrade to latest version (microsoft#9104)

[wordnet]add a new port (microsoft#8816)

* [wordnet]add a new port

* [wordnet]fix-uwp

[mathc] Add new port (microsoft#8394)

[glib] Fix install config.h (microsoft#7963)

* [glib] Fix install config.h