Minor fixes:
- Fixed printing uint64_t type
- Added a few missing parentheses

Bug: b/174866721
Change-Id: Ifd68cf493cffe1ef3dedffb85c6568caa337aca6
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/50893Tested-by: Alexis Hétu <sugoi@google.com>
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>