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/ada/gnatcoll/core.nix

@@ -0,0 +1,47 @@
+{ stdenv
+, lib
+, gnat
+, gprbuild
+, fetchFromGitHub
+, xmlada
+, which
+}:
+
+stdenv.mkDerivation rec {
+  pname = "gnatcoll-core";
+  version = "22.0.0";
+
+  src = fetchFromGitHub {
+    owner = "AdaCore";
+    repo = "gnatcoll-core";
+    rev = "v${version}";
+    sha256 = "0fn28dp6bgpp1sshr09m1x85g2gx11xqkiy410hiicfyg5hamh1l";
+  };
+
+  nativeBuildInputs = [
+    gprbuild
+    which
+    gnat
+  ];
+
+  # propagate since gprbuild needs to find
+  # referenced GPR project definitions
+  propagatedBuildInputs = [
+    gprbuild # libgpr
+  ];
+
+  makeFlags = [
+    "prefix=${placeholder "out"}"
+    "PROCESSORS=$(NIX_BUILD_CORES)"
+    # confusingly, for gprbuild --target is autoconf --host
+    "TARGET=${stdenv.hostPlatform.config}"
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/AdaCore/gnatcoll-core";
+    description = "GNAT Components Collection - Core packages";
+    license = licenses.gpl3Plus;
+    maintainers = [ maintainers.sternenseemann ];
+    platforms = platforms.all;
+  };
+}