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
Init5 @ 1 NONAME
ChkC5 @ 2 NONAME
BlkI5 @ 3 NONAME
GetGeneration @ 4 NONAME
RBlkI5 @ 5 NONAME
SetCloseLib @ 6 NONAME