fusion: Add a stub implementation of IAssemblyEnum.

include/fusion.idl

diff --git a/include/fusion.idl b/include/fusion.idl
index 6f14082..9963838 100644
--- a/include/fusion.idl
+++ b/include/fusion.idl
@@ -312,7 +312,14 @@
 ]
 interface IAssemblyEnum : IUnknown
 {
+    HRESULT GetNextAssembly(
+        [in] LPVOID pvReserved,
+        [out] IAssemblyName **ppName,
+        [in] DWORD dwFlags);
 
+    HRESULT Reset(void);
+
+    HRESULT Clone([out] IAssemblyEnum **ppEnum);
 }
 
 [