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/ustr/default.nix

@@ -0,0 +1,42 @@
+{ lib, stdenv, fetchurl }:
+
+stdenv.mkDerivation rec {
+  pname = "ustr";
+  version = "1.0.4";
+
+  src = fetchurl {
+    url = "http://www.and.org/ustr/${version}/${pname}-${version}.tar.bz2";
+    sha256 = "1i623ygdj7rkizj7985q9d6vj5amwg686aqb5j3ixpkqkyp6xbrx";
+  };
+
+  # Fixes bogus warnings that failed libsemanage
+  patches = [ ./va_args.patch ];
+
+  # Work around gcc5 switch to gnu11
+  NIX_CFLAGS_COMPILE = "-std=gnu89";
+
+  # Fix detection of stdint.h
+  postPatch = ''
+    sed -i 's,\(have_stdint_h\)=0,\1=1,g' Makefile
+    sed -i 's,\(USTR_CONF_HAVE_STDINT_H\) 0,\1 1,g' ustr-import.in
+  '';
+
+  preBuild = ''
+    makeFlagsArray+=("prefix=$out")
+    makeFlagsArray+=("LDCONFIG=echo")
+    makeFlagsArray+=("HIDE=")
+  '';
+
+  # Remove debug libraries
+  postInstall = ''
+    find $out/lib -name \*debug\* -delete
+  '';
+
+  meta = with lib; {
+    homepage = "http://www.and.org/ustr/";
+    description = "Micro String API for C language";
+    license = licenses.bsd2;
+    maintainers = [ ];
+    platforms = platforms.linux;
+  };
+}