data-layout is required in the target specification file

[sanxiyn]

The text says "The next five fields are required", giving arch, llvm-target, os, target-endian, target-pointer-width. But data-layout is also required.

By the way, how should one figure out the value of data-layout? ("Read LLVM source" is unsatisfactory.) A good method probably should be included in the text.

[Adrijaned]

"target-c-int-width" was also a required field for me, not being mentioned here. Anyways, nice tutorial!