Adjusted EPOCROOT handling so that in the context of Raptor invocation,
it also updates the environment variable so that other modules (such as
e32variant.pm) can also work without changes.
EXPORTS
Init3 @ 1 NONAME
ChkC3 @ 2 NONAME
BlkI3 @ 3 NONAME
GetGeneration @ 4 NONAME
RBlkI3 @ 5 NONAME
SetCloseLib @ 6 NONAME