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/libutempter/default.nix

@@ -0,0 +1,39 @@
+{ stdenv, fetchurl, lib, glib }:
+
+with lib;
+
+stdenv.mkDerivation rec {
+  pname = "libutempter";
+  version = "1.1.6";
+
+  src = fetchurl {
+    url = "mirror://ubuntu/pool/main/libu/libutempter/libutempter_${version}.orig.tar.bz2";
+    sha256 = "15y3xbgznjxnfmix4xg3bwmqdvghdw7slbhazb0ybmyf65gmd65q";
+  };
+
+  buildInputs = [ glib ];
+
+  patches = [ ./exec_path.patch ];
+
+  prePatch = ''
+    substituteInPlace Makefile --replace 2711 0711
+  '';
+
+  makeFlags = [
+    "libdir=\${out}/lib"
+    "libexecdir=\${out}/lib"
+    "includedir=\${out}/include"
+    "mandir=\${out}/share/man"
+  ];
+
+  meta = {
+    description = "Interface for terminal emulators such as screen and xterm to record user sessions to utmp and wtmp files";
+    longDescription = ''
+      The bundled utempter binary must be able to run as a user belonging to group utmp.
+      On NixOS systems, this can be achieved by creating a setguid wrapper.
+    '';
+    license = licenses.lgpl21Plus;
+    platforms = platforms.linux;
+    maintainers = [ maintainers.msteen ];
+  };
+}

pkgs/development/libraries/libutempter/exec_path.patch

@@ -0,0 +1,25 @@
+diff -ur libutempter-1.1.6/iface.c libutempter-1.1.6.patched/iface.c
+--- libutempter-1.1.6/iface.c	2010-11-04 18:14:53.000000000 +0100
++++ libutempter-1.1.6.patched/iface.c	2018-06-06 15:09:11.417755549 +0200
+@@ -60,9 +60,9 @@
+ 		_exit(EXIT_FAILURE);
+ 	}
+ 
+-	execv(path, argv);
++	execvp(path, argv);
+ #ifdef	UTEMPTER_DEBUG
+-	fprintf(stderr, "libutempter: execv: %s\n", strerror(errno));
++	fprintf(stderr, "libutempter: execvp: %s\n", strerror(errno));
+ #endif
+ 
+ 	while (EACCES == errno)
+@@ -79,7 +79,7 @@
+ 		if (setgid(sgid))
+ 			break;
+ 
+-		(void) execv(path, argv);
++		(void) execvp(path, argv);
+ 		break;
+ 	}
+ 
+Only in libutempter-1.1.6.patched: result