Added empty shell .s files and ttt.c file.

To supply place holders for missing symbols.

The ttt.c file was taken from the sr_x86_64 directory.

The .s files were taken from the previous branch attempt to compiler in the
raspberry pi. All of them are missing a proper implementation at this point.
Add arm as and architecture similar to x86_64.

Along the attempt to build the 64 bits track on the ARM.
This will, of course, require to revisit all the code generation logic.