Added a few missing types:
- Unsigned ints and vectors
- Signed and unsigned int samplers
- 2D Array samplers

Change-Id: I052f7da3b2cb24c5cd2bdd1cf1e3b3a2b0ee0a50
Reviewed-on: https://swiftshader-review.googlesource.com/3042Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>