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
Init12 @ 1 NONAME
ChkC12 @ 2 NONAME
BlkI12 @ 3 NONAME
GetGeneration @ 4 NONAME
RBlkI12 @ 5 NONAME
SetCloseLib @ 6 NONAME