tests/graw: use C99 print conversion specifier for 32 bit builds
Fixes formatting errors for 32 bit compilations, eg:
error: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Werror,-Wformat] printf("result1 = %lu result2 = %lu\n", res1.u64, res2.u64);
Reviewed-by: Emil Velikov emil.velikov@collabora.com