fix configure when pkgconfig is not available
fix configure when pkgconfig is not available

Signed-off-by: Sorin Vultureanu <8013ba55f8675034bc2ab0d6c3a1c9650437ca36@enea.com>
Reviewed-by: Antero Nousiainen <c3a357588030f529ecf72b6fa88c0350579fbee8@nokia.com>

OpenFastPath/ofp,TolikH/ofp,OpenFastPath/ofp,TolikH/ofp,OpenFastPath/ofp,OpenFastPath/ofp,TolikH/ofp