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/applications/video/hypnotix/libmpv-path.patch

@@ -0,0 +1,18 @@
+diff --git a/usr/lib/hypnotix/mpv.py b/usr/lib/hypnotix/mpv.py
+index f42a3be..f1fc40b 100644
+--- a/usr/lib/hypnotix/mpv.py
++++ b/usr/lib/hypnotix/mpv.py
+@@ -44,12 +44,7 @@ else:
+     # still better than segfaulting, we are setting LC_NUMERIC to "C".
+     locale.setlocale(locale.LC_NUMERIC, 'C')
+ 
+-    sofile = ctypes.util.find_library('mpv')
+-    if sofile is None:
+-        raise OSError("Cannot find libmpv in the usual places. Depending on your distro, you may try installing an "
+-                "mpv-devel or mpv-libs package. If you have libmpv around but this script can't find it, consult "
+-                "the documentation for ctypes.util.find_library which this script uses to look up the library "
+-                "filename.")
++    sofile = '@libmpv@'
+     backend = CDLL(sofile)
+     fs_enc = sys.getfilesystemencoding()
+