api: is_supported_system: check for manjaro

api

@@ -405,8 +405,11 @@ is_supported_system() {
   elif cat /etc/os-release | grep PRETTY_NAME | tr -d '"' | awk -F= '{print $2}' | grep -qi 'stretch\|wheezy\|jessie';then
     echo "Pi-Apps is not supported on your outdated operating system. Expect many apps to fail. Consider upgrading your operating system."
     return 1
+  elif cat /etc/os-release | grep PRETTY_NAME | tr -d '"' | awk -F= '{print $2}' | grep -qi 'manjaro';then
+    echo "Pi-Apps is not supported on Manjaro."
+    return 1
   elif [[ "$(uname -m)" == armv6* ]];then
-    echo "Pi-Apps has not been tested on armv6 Raspberry Pi boards. Expect many apps to fail."
+    echo "Pi-Apps is not supported on ARMv6 Raspberry Pi boards. Expect some apps to fail."
     return 1
   elif [ "$(id -u)" == 0 ]; then
     echo "Pi-Apps is not designed to be run as root user."