picoc/include.c: Further beautify some code.
picoc/platform.c: Beautify some code.
sim: Include elua_mmc_sim.c and common_fs.c in SConstruct.

The official elua0.9 release doesn't include this
in SConstruct. Hence, building for the sim target
on off-the-shelf elua0.9 throws compiler errors.
sim target: Fix compilation errors.

Now, the sim target can be built with
Lua on Alcor6L.
modules/spi.c: Fix identifier name.
modules/can.c: Fix typo.
picoc/rodefs.h: #undef the correct macro.
Include rodefs.h in picoc/rotable.h
Include rotable.h in picoc/platform.c

With this, the clibrary for PicoC is activated
when the tiny RAM is off.