New Cog VMs available

CogVM binaries as per VMMaker.oscog-eem.1096/r3282

Fix assertClassOf:is: to handle immediates upstream of isClassOfNonImm:equalTo:.

Fixes a potential crash when x or y is sent to immediates (bytecodePrimX/Y).

Include the GdbARMPlugin on linux (Spur only) & Mac OS X (V3 & Spur).