Handle 32-bit overflows in disk utilization stats #680

Job	Run time
build (linux-gcc)	10m 51s
build (linux-clang)	10m 54s
build (macos)	7m 7s
build (linux-i686-gcc)	8m 36s
build (android)	1m 12s
build (windows-cygwin-64)	11m 42s
build (windows-cygwin-32)	12m 49s
build (windows-msys2-64)	10m 57s
build (android-recovery, ubuntu-22.04, aarch64-linux-android32)	52s
	1h 15m 0s

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