tensorflow: Fix compilation with numpy 1.19.x

Numpy introduced a breaking API change in version 1.19.x, see [1].

There is a simple fix [2] available in the master branch.

[1]: tensorflow/tensorflow#40688
[2]: tensorflow/tensorflow@75ea0b3

(cherry picked from commit 8f5bfd6)

pkgs/development/python-modules/tensorflow/1/default.nix

@@ -132,6 +132,13 @@ let
       })
       ./lift-gast-restriction.patch
 
+      (fetchpatch {
+        # fix compilation with numpy >= 1.19
+        name = "add-const-overload.patch";
+        url = "https://github.com/tensorflow/tensorflow/commit/75ea0b31477d6ba9e990e296bbbd8ca4e7eebadf.patch";
+        sha256 = "1xp1icacig0xm0nmb05sbrf4nw4xbln9fhc308birrv8286zx7wv";
+      })
+
       # cuda 10.2 does not have "-bin2c-path" option anymore
       # https://github.com/tensorflow/tensorflow/issues/34429
       ../cuda-10.2-no-bin2c-path.patch