1) fix_tools_exports.pl need only be run on Windows hosts; was run unnecessarily on Linux too.
2) Need to export modload.pm on Linux as well as Windows hosts.
/*
There is a general assumption that there is always a pre-include file
in every build. So for the cases where there is no .hrh file in the
epoc32 tree, yet, you can use this file.
The "nohrh" variant points VARIANT_HRH at this file.
*/