Fix missprint - unknown variable name.

Signed-off-by: hellcom <vitalii.stoianov.ua@gmail.com>
diff --git a/configure.py b/configure.py
index 361bd47..52a5137 100644
--- a/configure.py
+++ b/configure.py
@@ -852,7 +852,7 @@
 
     # Reset and retry
     print('Invalid path to CUDA %s toolkit. %s cannot be found' %
-          (tf_cuda_version, cuda_toolkit_path_full))
+          (tf_cuda_version, cuda_toolkit_paths_full))
     environ_cp['TF_CUDA_VERSION'] = ''
     environ_cp['CUDA_TOOLKIT_PATH'] = ''