The 'opkg.py' script installed by host-opkg-utils has as shebang:
#!/usr/bin/env python3
which may not be available on all host machines.
Add a potential dependency on host-python3 via BR2_PYTHON3_HOST_DEPENDENCY,
which will only add the host-python3 dependency if no python3 is already
available on the host.
Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>