Print PKG_CONFIG_PATH value in waf configure
Print PKG_CONFIG_PATH value in waf configure

To make it easier to see where pkg-config will search for dependencies

carthach/essentia,carthach/essentia,MTG/essentia,carthach/essentia,MTG/essentia,carthach/essentia,carthach/essentia,MTG/essentia,MTG/essentia,MTG/essentia