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.
; dlltool --output-def ../../EPOC32/BUILD/E32TEST/MARMD/REL/T_DUID.def ../../EPOC32/BUILD/E32TEST/MARMD/REL/T_DUID.in
EXPORTS
dummyExport__Fv @ 1 NONAME