Change travis.sh to check if variables are equal to yes instead of not-empty. Before this, setting `VALGRIND=wat` was considered as true, and to make it evaluate as false you had to unset the variable `VALGRIND=` but not it checks if `VALGRIND=yes` and if it's not `yes` then it's evaluated to false
Change travis.sh to check if variables are equal to yes instead of
not-empty.
Before this, setting `VALGRIND=wat` was considered as true, and to make it
evaluate as false you had to unset the variable `VALGRIND=` but not it
checks if `VALGRIND=yes` and if it's not `yes` then it's evaluated to
false

afk11/secp256k1,afk11/secp256k1,bitcoin-core/secp256k1,peterdettman/secp256k1,afk11/secp256k1,afk11/secp256k1,evoskuil/secp256k1,bitcoin/secp256k1,bitcoin/secp256k1,evoskuil/secp256k1,afk11/secp256k1,bitcoin/secp256k1,ElementsProject/secp256k1-zkp,evoskuil/secp256k1,bitcoin/secp256k1,peterdettman/secp256k1,bitcoin/secp256k1,evoskuil/secp256k1,evoskuil/secp256k1,bitcoin-core/secp256k1,ElementsProject/secp256k1-zkp