Include zstd as submodule#26

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voltagex wants to merge 4 commits intobp74:masterfrom

baxterworks-build:feature/submodule

Commits on Aug 14, 2021

Add zstd as a submodule and attempt build for x64
Adam Baxter
committed
Fix build 1
Adam Baxter
committed
Set VS2019
Adam Baxter
committed

Commits on Oct 10, 2021

Cleanup, use v1.5.0 of submodule
Adam Baxter
committed