CogVM binaries as per VMMaker.oscog-eem.1113/r3284
Redo free space allocation on Spur image load.�� Provide a minimum ammount of
free space, taking into account extant free space.�� Provisionally use
extraVMMemory in the header, defaulting to growHeadroom if extraVMMemory is
empty.�� This can be revised if folks protest.
Exclude dumpImage: from Spur (no seg support yet)
These include release candidate Spur VMs for Squeak 5.
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