* mcs/expression.cs (Invocation.OverloadResolve): Replace reflected
override methods with their base virtual methods, rather than
skipping over them.
* gmcs/expression.cs: Likewise.
* mcs/typemanager.cs (TypeManager.GetOverride): New.
* gmcs/typemanager.cs: Likewise.
* tests/Makefile (TEST_ILS): New list of CIL test libraries.
* tests/test-483-lib.il, tests/test-483.cs: New test from #75636.
svn path=/trunk/mcs/; revision=55226
