Fix USE_LARGE_FILES with bcc32 on Win32?

Fix USE_LARGE_FILES with bcc32 on Win32?

Trawling through all these config files, I think I've found the
reason why bcc32 builds with USE_LARGE_FILES were failing (e.g.
(see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2005-06/msg00809.html):
lseeksize and lseektype were set to 8 and __int64, but Borland's
<io.h> suggests that they should be 4 and long respectively.

Changing them accordingly makes all tests pass. And I see that
win32/win32.c has special handling for __BORLANDC__ + USE_LARGE_FILES,
presumably to cope with this difference?

p4raw-id: //depot/perl@25216