Support long paths on amd64 (#5460)
Support long paths on amd64 (#5460)

For some reason, these overrides appear to be necessary on x64/amd64
.NET Framework. They were removed in #3960 because we thought they
were redundant now, but that appears to only be the case on x86.

Works around #5331, but ideally we'll figure out why we're not getting
the defaults we should be for targeting 4.7.2.
sean-gilliam/msbuild,rainersigwald/msbuild,cdmihai/msbuild,mono/msbuild,cdmihai/msbuild,AndyGerlicher/msbuild,cdmihai/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,sean-gilliam/msbuild,cdmihai/msbuild,rainersigwald/msbuild,mono/msbuild,mono/msbuild,AndyGerlicher/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,mono/msbuild,AndyGerlicher/msbuild