Orange C binaries still have .exe extensions on Linux and FreeBSD

[chatchoi]

This is about the compilation of Orange C itself, not the binaries produced by Orange C. It has not yet reached this stage.

As @mh466lfa has noted, the binaries still have .exe extensions even on Linux and FreeBSD. Running file against them confirmed that they are valid ELF binaries. So, the rules in your makefile incorrectly introduced the .exe extensions on Linux and FreeBSD.