fix path

fixOptionalDepentecies.sh

 #!/bin/bash
 #Used at post-installation to create fake modules if optionalDepenetdencies are not installed
 NPMROOT=`npm root`
-[[ ! -f ${NPMROOT%%node_modules*}/pg-native/index.js ]] && bash -c "mkdir -p ${NPMROOT}/pg-native && touch ${NPMROOT}/pg-native/index.js" || exit 0
+PGNATIVEPATH=${NPMROOT%%node_modules*}node_modules/pg-native
+echo "check $PGNATIVEPATH for existance"
+[[ ! -f $PGNATIVEPATH/index.js ]] && bash -c "mkdir -p ${PGNATIVEPATH} && touch ${PGNATIVEPATH}/index.js" && echo "${PGNATIVEPATH} created" || exit 0