configure: Fix out-of-tree build
configure: Fix out-of-tree build

l-smash/l-smash,silverfilain/L-SMASH,l-smash/l-smash,l-smash/l-smash,silverfilain/L-SMASH,canbal/l-smash,silverfilain/L-SMASH,maki-rxrz/L-SMASH,canbal/l-smash,maki-rxrz/L-SMASH