Revert "cmake/uselib: better performance, preserve cache when running twice"
Revert "cmake/uselib: better performance, preserve cache when running twice"

This reverts commit 7fa2eefff2af6df0208ec6f47d6655ae1777075a.
does not work !

aldebaran/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild