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/libagar/libagar_test.nix

@@ -0,0 +1,34 @@
+{ lib, stdenv, fetchurl, bsdbuild, libagar, perl, libjpeg, libpng, openssl }:
+
+let srcs = import ./srcs.nix { inherit fetchurl; }; in
+stdenv.mkDerivation {
+  pname = "libagar-test";
+  inherit (srcs) version src;
+
+  sourceRoot = "agar-1.5.0/tests";
+
+  # Workaround build failure on -fno-common toolchains:
+  #   ld: textdlg.o:(.bss+0x0): multiple definition of `someString';
+  #     configsettings.o:(.bss+0x0): first defined here
+  # TODO: the workaround can be removed once nixpkgs updates to 1.6.0.
+  NIX_CFLAGS_COMPILE = "-fcommon";
+
+  preConfigure = ''
+    substituteInPlace configure.in \
+      --replace '_BSD_SOURCE' '_DEFAULT_SOURCE'
+    cat configure.in | ${bsdbuild}/bin/mkconfigure > configure
+  '';
+
+  configureFlags = [ "--with-agar=${libagar}" ];
+
+  buildInputs = [ perl bsdbuild libagar libjpeg libpng openssl ];
+
+  meta = with lib; {
+    broken = (stdenv.isLinux && stdenv.isAarch64);
+    description = "Tests for libagar";
+    homepage = "http://libagar.org/index.html";
+    license = with licenses; bsd3;
+    maintainers = with maintainers; [ ramkromberg ];
+    platforms = with platforms; linux;
+  };
+}