uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/tools/filesystems/gitfs/default.nix

@@ -0,0 +1,43 @@
+{ lib, fetchFromGitHub, python3Packages }:
+
+python3Packages.buildPythonApplication rec {
+  pname = "gitfs";
+  version = "0.5.2";
+
+  src = fetchFromGitHub {
+    owner = "PressLabs";
+    repo = "gitfs";
+    rev = version;
+    sha256 = "1jzwdwan8ndvp2lw6j7zbvg5k9rgf2d8dcxjrwc6bwyk59xdxn4p";
+  };
+
+  patchPhase = ''
+    # requirement checks are unnecessary at runtime
+    echo > requirements.txt
+
+    # NOTE: As of gitfs 0.5.2, The pygit2 release that upstream uses is a major
+    # version behind the one packaged in nixpkgs.
+    substituteInPlace gitfs/mounter.py --replace \
+      'from pygit2.remote import RemoteCallbacks' \
+      'from pygit2 import RemoteCallbacks'
+  '';
+
+  checkInputs = with python3Packages; [ pytest pytest-cov mock ];
+  propagatedBuildInputs = with python3Packages; [ atomiclong fusepy pygit2 six ];
+
+  checkPhase = "py.test";
+  doCheck = false;
+
+  meta = {
+    description = "A FUSE filesystem that fully integrates with git";
+    longDescription = ''
+      A git remote repository's branch can be mounted locally,
+      and any subsequent changes made to the files will be
+      automatically committed to the remote.
+    '';
+    homepage = "https://github.com/PressLabs/gitfs";
+    license = lib.licenses.asl20;
+    platforms = lib.platforms.unix;
+    maintainers = [ lib.maintainers.robbinch ];
+  };
+}