Use smaller context for applying patch
Use smaller context for applying patch

This will help for future version of VPP that modify lines around patched parts.
ondrej-fabry/vpp-agent,ondrej-fabry/vpp-agent,VladoLavor/vpp-agent,VladoLavor/vpp-agent,VladoLavor/vpp-agent,ondrej-fabry/vpp-agent