Fix the formatting for size_t in perf_test This will print 64bit unsigned int max properly Bug: b/414880678 Test: (process memory size SIZE_MAX) *RESULT TracePerf_vulkan.memory_median: black_beacon= 18446744073709551615 sizeInBytes Change-Id: I27f0e2dd34d7fc7c055bea64ecd786e0567b754a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6543549 Commit-Queue: Xiang Wang <xwxw@google.com> Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com>