[linker]: Fix my previous commit.

We need to resolve all the TypeReferences before we update their scopes.
After setting the scope to null, calling Resolve() on a nested child would
crash.
[runtime] Fix the ARM build.
Revert "Implementation of Properties and Methods in MethodSignatureGenerator.cs"

This reverts commit 46cd052a3ab3102c59ed70f60a6290b4ed63da97.

This breaks the build.