add centos support to get-peasoup-package.sh

Former-commit-id: 63f46fd4

get-peasoup-packages.sh

@@ -52,8 +52,8 @@ install_packs()
 {
 	for i in $*
 	do
-		which apt-get 2> /dev/null 
-		if [[ $? = 0  ]]; then
+		which apt-get 1> /dev/null 2> /dev/null 
+		if [[ $? == 0  ]]; then
 			sudo apt-get install $i -y 
 		else 
 			sudo yum install $i -y