integer_ops: fix -Wformat warnings (#1860)

The main sources of warnings were:

 * Printing of a `size_t` which requires the `%zu` specifier.

 * Printing of `cl_long`/`cl_ulong` which is now done using the
   `PRI*64` macros to ensure portability across 32 and 64-bit builds.

Signed-off-by: Sven van Haastregt <sven.vanhaastregt@arm.com>

test_conformance/integer_ops/test_upsample.cpp

@@ -213,7 +213,7 @@ void * create_upsample_data( ExplicitType type, void *sourceA, void *sourceB, si
             }
             break;
         default:
-            log_error( "ERROR: unknown type size: %ld\n", tSize );
+            log_error("ERROR: unknown type size: %zu\n", tSize);
             return NULL;
     }