add -P to invocation of df(1) to ensure expected output format

git-svn-id: svn://localhost/ardour2/branches/3.0@9604 d708f5d6-7413-0410-9779-e7cbd77b26cf

tools/linux_packaging/stage2.run

@@ -196,7 +196,7 @@ else
 	REQUIRED_BYTES=$(cat .${PGM_NAME}_${ARCH}-*.size)
 
 	#Check space in current folder
-	FREE_BYTES=$(df -B 1 ${PKG_PATH} | grep / | awk '{print $4}')
+	FREE_BYTES=$(df -P -B 1 ${PKG_PATH} | grep / | awk '{print $4}')
 
 	if [ ${FREE_BYTES} -le ${REQUIRED_BYTES} ] ; then
 		echo ""