added request amb80 (system time)

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40601

plugins/include/sourcemod.inc

@@ -146,6 +146,14 @@ native LogMessage(const String:format[], {Handle,Float,String,_}:...);
  */
 native LogError(const String:format[], {Handle,Float,String,_}:...);
 
+/**
+ * Gets the system time as a unix timestamp.
+ *
+ * @param bigStamp		Optional array to store the 64bit timestamp in.
+ * @return				32bit timestamp (number of seconds since unix epoch).
+ */
+native GetTime(bigStamp[2]={0,0});
+
 /**
  * Sets the seed value for the global Half-Life 2 Random Stream
  *