Move to php 7 because php5 is not in repo anymore

Author: guysoft

src/modules/fullpageos/start_chroot_script

@@ -34,7 +34,7 @@ apt-get install -y --force-yes vim x11vnc expect
 #Install web stack
 if [ "$FULLPAGEOS_INCLUDE_LIGHTTPD" == "yes" ]
 then
-    apt-get install -y lighttpd php5-common php5-cgi php5
+    apt-get install -y lighttpd php-common php-cgi php
     lighty-enable-mod fastcgi-php
     #service lighttpd force-reload
     chown -R www-data:www-data /var/www/html