Revert "diskusage: Use mkdir -p to create dirs."
Revert "diskusage: Use mkdir -p to create dirs."

This reverts commit accac9d1264ecb2cf826239c854bf96375050623. I don't
see what the -p can possibly achieve.

f-droid/fdroiddata,f-droid/fdroid-data,f-droid/fdroiddata