Compile with NOASM=1 by default

The asm code for the software renderer is very old and unstable which leads to alot of random segfaults when using it, so disable it by default modern GCC is very good at optimizing code anyways, so theres no real benefit in keeping those

I'd personally prefer just ripping out all of the ASM code, but this is also OK.

Did just that since its makes things alot cleaner !348