OS/2 support in 1.0.4pre6

[Shigeru Miyata]

Lars, some of the discussion between me and Arnd was actually
intended for the official version of LyX 1.0  Sorry we didn't
make the distinction very clear.
Please apply the patch below and replace lib/configure.cmd
or 1.0.4 won't work here.

Regards,
        SMiyata

os2support-1.0.4pre6.bz2