Disable NerdBank.GitVersioning in xplat (#721)
Disable NerdBank.GitVersioning in xplat (#721)

Workaround for #694.
cdmihai/msbuild,rainersigwald/msbuild,mono/msbuild,Microsoft/msbuild,AndyGerlicher/msbuild,AndyGerlicher/msbuild,jeffkl/msbuild,Microsoft/msbuild,AndyGerlicher/msbuild,cdmihai/msbuild,jeffkl/msbuild,rainersigwald/msbuild,jeffkl/msbuild,sean-gilliam/msbuild,mono/msbuild,chipitsine/msbuild,cdmihai/msbuild,Microsoft/msbuild,rainersigwald/msbuild,chipitsine/msbuild,Microsoft/msbuild,cdmihai/msbuild,rainersigwald/msbuild,chipitsine/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,mono/msbuild,mono/msbuild,jeffkl/msbuild,chipitsine/msbuild,sean-gilliam/msbuild,sean-gilliam/msbuild