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/data/documentation/linux-manual/default.nix

@@ -0,0 +1,40 @@
+{ lib, stdenv, fetchurl, perl, linuxPackages_latest }:
+
+stdenv.mkDerivation rec {
+  pname = "linux-manual";
+  inherit (linuxPackages_latest.kernel) version src;
+
+  nativeBuildInputs = [ perl ];
+
+  dontConfigure = true;
+  dontBuild = true;
+
+  postPatch = ''
+    patchShebangs --build \
+      scripts/kernel-doc \
+      scripts/split-man.pl
+  '';
+
+  installPhase = ''
+    mandir=$out/share/man/man9
+    mkdir -p $mandir
+
+    KBUILD_BUILD_TIMESTAMP=$(stat -c %Y Makefile) \
+    grep -F -l -Z \
+      --exclude-dir Documentation \
+      --exclude-dir tools \
+      -R '/**' \
+      | xargs -0 -n 256 -P $NIX_BUILD_CORES \
+        $SHELL -c '{ scripts/kernel-doc -man "$@" || :; } \
+          | scripts/split-man.pl '$mandir kernel-doc
+
+    test -f $mandir/kmalloc.9
+  '';
+
+  meta = with lib; {
+    homepage = "https://kernel.org/";
+    description = "Linux kernel API manual pages";
+    license = licenses.gpl2Only;
+    maintainers = with maintainers; [ mvs ];
+  };
+}