better gen_expected script

tests/gen_expected.sh

@@ -1,10 +1,12 @@
+#!/usr/bin/env bash
+
 argsFile=$1.args
 if [ -e ${argsFile} ]; then
 	args=$(cat ${argsFile})
 fi
 echo "Args:" ${args}
-dfmt --brace_style=allman ${args} $1.d > allman/$1.d.ref
-dfmt --brace_style=otbs ${args} $1.d > otbs/$1.d.ref
+../bin/dfmt --brace_style=allman ${args} $1.d > allman/$1.d.ref
+../bin/dfmt --brace_style=otbs ${args} $1.d > otbs/$1.d.ref
 
 echo "------------------"
 echo "allman:"