FROMLIST: selftests: futex: Use a 64-bit time_t am: 2cfedebbe1 am: c9773e4169 am: 6123948ed6

Original change: https://android-review.googlesource.com/c/platform/external/linux-kselftest/+/2791624

Change-Id: I3382d5bcdc14680a71d084535337bd4a9f6cdf0c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>