64 bit builds

[thoni56]

Currently the ToolMaker suite builds cleanly on Cygwin32, Msys2/Mingw32 and Linux (cross-compilation to 32 bit with multilib).

There are a couple of warnings if you try to build for 64-bit. Also you should use i686---gcc cross-compiler in these cases.

[thoni56]

Now native 64-bit builds work on Linux, cygwin64 with msys2 in progress.

NOTE: to actually support a new platform you also have to update the template/skeleton files to support the new os in the checks for currentOs. Otherwise the tests will fail with "unsupported OS in ...".