[ci skip] Change some log messages' level

'Class Loaded' type of messages flood log files when
log_threshold is set to 2 (debug). They're now logged
as 'info' level.

This is manually applying PR #1528, which was created
to do the same thing, but became outdated.
diff --git a/system/libraries/Profiler.php b/system/libraries/Profiler.php
index 9a4e833..d3f5d8d 100644
--- a/system/libraries/Profiler.php
+++ b/system/libraries/Profiler.php
@@ -116,6 +116,7 @@
 		}
 
 		$this->set_sections($config);
+		log_message('info', 'Profiler Class Initialized');
 	}
 
 	// --------------------------------------------------------------------