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/python-modules/cairocffi/dlopen-paths.patch

@@ -0,0 +1,61 @@
+Patch dlopen() to allow direct paths to all required libs
+
+This is an update of the patch submitted in
+https://github.com/NixOS/nixpkgs/commit/b13e44e094989d3a902f8c73b22e8d3c0cc7acf4
+by Alexander V. Nikolaev <avn@avnik.info>
+
+---
+ cairocffi/__init__.py | 34 ++++++++++++++++------------------
+ 1 file changed, 16 insertions(+), 18 deletions(-)
+
+diff --git a/cairocffi/__init__.py b/cairocffi/__init__.py
+index 307d58c..43c29e3 100644
+--- a/cairocffi/__init__.py
++++ b/cairocffi/__init__.py
+@@ -21,28 +21,26 @@ VERSION = __version__ = (Path(__file__).parent / 'VERSION').read_text().strip()
+ version = '1.17.2'
+ version_info = (1, 17, 2)
+
++# Use hardcoded soname, because ctypes.util use gcc/objdump which shouldn't be
++# required for runtime
++_LIBS = {
++    'cairo': '@cairo@/lib/libcairo@ext@',
++    'glib-2.0': '@glib@/lib/libglib-2.0@ext@',
++    'gobject-2.0': '@glib@/lib/libgobject-2.0@ext@',
++    'gdk_pixbuf-2.0': '@gdk_pixbuf@/lib/libgdk_pixbuf-2.0@ext@',
++}
++
+
+ def dlopen(ffi, library_names, filenames):
+     """Try various names for the same library, for different platforms."""
+-    exceptions = []
+-
+     for library_name in library_names:
+-        library_filename = find_library(library_name)
+-        if library_filename:
+-            filenames = (library_filename,) + filenames
+-        else:
+-            exceptions.append(
+-                'no library called "{}" was found'.format(library_name))
+-
+-    for filename in filenames:
+-        try:
+-            return ffi.dlopen(filename)
+-        except OSError as exception:  # pragma: no cover
+-            exceptions.append(exception)
+-
+-    error_message = '\n'.join(  # pragma: no cover
+-        str(exception) for exception in exceptions)
+-    raise OSError(error_message)  # pragma: no cover
++        path = _LIBS.get(library_name, None)
++        if path:
++            lib = ffi.dlopen(path)
++            if lib:
++                return lib
++
++    raise OSError("dlopen() failed to load a library: %s as %s" % (library_name, path))
+
+
+ cairo = dlopen(
+--
+2.19.2