* gen-extern-type.il: New. Test for ref to an external generic type.

* gen-extern-type.il: New. Test for ref to an external generic type.
* gen-array1.il, gen-array-2.il: New. Test for duplicate typespecs for
generic types and arrays of the same.
* gen-interf-1.il, gen-interf-2.il: New. Test for inheriting from a generic
base class and implementing generic interfaces.
* gen-struct.il: New. Test for generic valuetype.
* gen-local.il: New. No entry in the TypeSpec table should be emitted if a
generic type is referenced only as a local var.
* one.cs, two.cs: Updated to include types required the new tests.

git-svn-id: svn+ssh://mono-cvs.ximian.com/source/trunk/mcs@55092 e3ebcda4-bce8-0310-ba0a-eca2169e7518