Support for pass-by-value kernels.

This change allows the JB-mr1+ target API to declare compute kernels
using "__attribute__((kernel))". This disables the use of pointers in the
function signature and forces any output to be explicitly returned and
input to be passed only by value. We still allow the user to add x, y
coordinates if they want them.

Bug: 7166741

Change-Id: I1407fceefb11c7d6c17221ca156cfce443c2b218
21 files changed