For PR950:

For PR950:
Update for signless integer types:
1. Replace [us]byte with i8
2. Replace [u]short with i16
3. Replace [u]int   with i32
4. Replace [u]long  with i64
5. Document the "define" keyword and use it in all examples.
6. Document parameter attributes and how they affect function types.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32791 91177308-0d34-0410-b5e6-96231b3b80d8