The assemblies should be built when the lib directory is build because
the generated application manifest should be used with all the tools
and executables that use the libraries.
The shim code creates DLLs that intend to be ABI compatible with MIT
Kerberos for Windows DLLs. At its current state, the shim isn't
complete and there are multiple functions that are missing.
Fix manifests to include manifestVersion attribute and introduce an
application manifest. The application manifest will be included in
the eventual SDK so that applications that depend on Heimdal can
correctly reference the Heimdal assemblies.
