Uncommented the CLR_RT_TypeSystem::FindTypeDef functionality (#847)
Uncommented the CLR_RT_TypeSystem::FindTypeDef functionality (#847)

That fixes issue #397
Why was that commented out?

Signed-off-by: Matthias Jentsch <59bd0a3ff43b32849b319e645d4798d8a5d1e889@matthias-jentsch.de>
nanoframework/nf-interpreter,Eclo/nf-interpreter,nanoframework/nf-interpreter,nanoframework/nf-interpreter,Eclo/nf-interpreter,Eclo/nf-interpreter,nanoframework/nf-interpreter,Eclo/nf-interpreter