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/development/libraries/imath/default.nix

@@ -0,0 +1,27 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, cmake
+}:
+
+stdenv.mkDerivation rec {
+  pname = "imath";
+  version = "3.1.5";
+
+  src = fetchFromGitHub {
+    owner = "AcademySoftwareFoundation";
+    repo = "imath";
+    rev = "v${version}";
+    sha256 = "sha256-pniIhpq2eXAZemq8LavXXv6+tGrBkqZ09Kjvi4aZdu8=";
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  meta = with lib; {
+    description = "Imath is a C++ and python library of 2D and 3D vector, matrix, and math operations for computer graphics";
+    homepage = "https://github.com/AcademySoftwareFoundation/Imath";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ paperdigits ];
+    platforms = platforms.all;
+  };
+}