Making tuner_confs.txt path absolute

hpvm/test/dnn_benchmarks/keras/Benchmark.py

@@ -43,7 +43,7 @@ class Benchmark:
               
         src_file = os.getcwd() + "/" + working_dir + "/" + src_name   #  approxhpvm_src.cc"
         target_binary = os.getcwd() + "/" + working_dir + "/" + binary_name    # HPVM_binary"
-        approx_conf_file = "tuner_confs.txt"
+        approx_conf_file = os.getcwd() + "/" + working_dir + "/tuner_confs.txt"
 
         FNULL = open(os.devnull, 'w')