Merge pull request #36 from lightninglabs/fix-loop-build

generate: fix Loop proto compile error

Author: guggero

generate.sh

@@ -108,7 +108,7 @@ CHECKOUT_COMMIT=$LOOP_COMMIT
 COMPONENT=loop
 COMMAND=loop
 DAEMON=loopd
-PROTO_SRC_DIR=""
+PROTO_SRC_DIR="swapserverrpc"
 EXCLUDE_PROTOS="server.proto -not -name common.proto"
 EXPERIMENTAL_PACKAGES=""
 INSTALL_CMD="make install"