Don't ask for MKL_THREADING_LAYER if numpy is fixed.

theano/configdefaults.py

@@ -1246,6 +1246,11 @@ def check_mkl_openmp():
     if ('MKL_THREADING_LAYER' in os.environ and
             os.environ['MKL_THREADING_LAYER'] == 'GNU'):
         return
+    try:
+        import numpy._mklinit
+        return
+    except ImportError:
+        pass
     try:
         import mkl
         if '2018' in mkl.get_version_string():