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/openslp/CVE-2016-4912.patch

@@ -0,0 +1,11 @@
+--- a/common/slp_xmalloc.c
++++ b/common/slp_xmalloc.c
+@@ -206,7 +206,7 @@ void * _xrealloc(const char * file, int line, void * ptr, size_t size)
+          if (newptr == 0)
+             return 0;
+          memcpy(newptr, ptr, x->size);
+-         _xfree(file, line, x);
++         _xfree(file, line, ptr);
+       }
+       return newptr;
+    }