Add -fatal-llvm-errors option to make LLVM diagnostic errors fatal.
Add -fatal-llvm-errors option to make LLVM diagnostic errors fatal.

Additionally fix output of errors in the case where -enable-out=0
and -enable-errs=1.

googlestadia/llpc,googlestadia/llpc,GPUOpen-Drivers/llpc,googlestadia/llpc,googlestadia/llpc,googlestadia/llpc,GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc