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/xavs/default.nix

@@ -0,0 +1,48 @@
+{ lib, stdenv, fetchsvn }:
+
+stdenv.mkDerivation rec {
+  pname = "xavs";
+  version = "55";
+
+  src = fetchsvn {
+    url = "https://svn.code.sf.net/p/xavs/code/trunk";
+    rev = version;
+    sha256 = "0drw16wm95dqszpl7j33y4gckz0w0107lnz6wkzb66f0dlbv48cf";
+  };
+
+  enableParallelBuilding = true;
+
+  patchPhase = ''
+    patchShebangs configure
+    patchShebangs config.sub
+    patchShebangs version.sh
+    patchShebangs tools/countquant_xavs.pl
+    patchShebangs tools/patcheck
+    patchShebangs tools/regression-test.pl
+    patchShebangs tools/xavs-format
+    '' + lib.optionalString stdenv.isDarwin ''
+    substituteInPlace config.guess --replace 'uname -p' 'uname -m'
+    substituteInPlace configure \
+      --replace '-O4' '-O3' \
+      --replace ' -s ' ' ' \
+      --replace 'LDFLAGS -s' 'LDFLAGS' \
+      --replace '-dynamiclib' ' ' \
+      --replace '-falign-loops=16' ' '
+    substituteInPlace Makefile --replace '-Wl,-soname,' ' '
+    '';
+
+  configureFlags = [
+    "--enable-pic"
+    "--enable-shared"
+    # Bug preventing compilation with assembly enabled
+    "--disable-asm"
+  ];
+
+  meta = with lib; {
+    description = "AVS encoder and decoder";
+    homepage    = "http://xavs.sourceforge.net/";
+    license     = licenses.lgpl2;
+    platforms   = platforms.linux ++ platforms.darwin;
+    maintainers = with maintainers; [ codyopel ];
+  };
+}