t/verify: fix Windows read tests #771

Job	Run time
build-containers (debian, debian, bookworm, x86_64)	4m 55s
build (linux-gcc)	5m 28s
build-containers (fedora, fedora, 40, x86_64)	5m 46s
build (linux-clang)	6m 9s
build-containers (alma, almalinux, 9, x86_64)	5m 38s
build (macos)	3m 12s
build-containers (oracle, oraclelinux, 9, x86_64)	5m 48s
build-containers (rocky, rockylinux, 9, x86_64)	6m 6s
build (linux-i686-gcc)	5m 26s
build-containers (ubuntu, ubuntu, noble, i686)	4m 48s
build-containers (ubuntu, ubuntu, noble, x86_64)	5m 30s
build (android)	37s
build (windows-cygwin-64)	9m 24s
build (windows-cygwin-32)	9m 14s
build (windows-msys2-64)	8m 9s
build (android-recovery, ubuntu-22.04, aarch64-linux-android32)	32s
	1h 26m 42s

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