valgrind: Make sure 3.8.1 is not default version
valgrind: Make sure 3.8.1 is not default version

Signed-off-by: Esben Haabendal <c5ba3f1141bb30a64dd6c7e6726a53a85adc9442@prevas.dk>

jacobbarsoe/rpi-base,oe-lite-rpi/base,oe-lite-rpi/base,jacobbarsoe/rpi-base