DOC benchmark results for GTX 970 + cuda 7.5

Tested on Ubuntu 16.04. On first two runs the result is 0.71 or 0.7, but then it is consistently 0.66s.

DOC benchmark results for GTX 970 + cuda 7.5
f46a085a · Mikhail Korobov · b69ad54d · f46a085a
--- a/theano/misc/check_blas.py
+++ b/theano/misc/check_blas.py
@@ -264,7 +264,7 @@ if __name__ == "__main__":
        GTX 780
        GTX 980 Ti        0.41s
        GTX 980
-        GTX 970
+        GTX 970           0.66s
        GTX 680                  1.57s
        GRID K520
        GTX 750 Ti        2.01s  2.01s