Land rapid7#5649, Fix undefined sysinfo method error in meterpreter.rb

Author: wchen-r7

lib/msf/base/sessions/meterpreter.rb

@@ -375,9 +375,9 @@ def load_session_info
             :host => self,
             :workspace => wspace,
             :data => {
-              :name => sysinfo["Computer"],
-              :os => sysinfo["OS"],
-              :arch => sysinfo["Architecture"],
+              :name => sys.config.sysinfo["Computer"],
+              :os => sys.config.sysinfo["OS"],
+              :arch => sys.config.sysinfo["Architecture"],
             }
           })