tests/graw: use C99 print conversion specifier for 32 bit builds

Merged Mark Janes requested to merge majanes/mesa:bug110847 into master

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

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