added SPDLOG_CLOCK_MONOTONIC example entry in tweakme file

include/spdlog/tweakme.h

@@ -17,6 +17,14 @@
 ///////////////////////////////////////////////////////////////////////////////
 
 
+///////////////////////////////////////////////////////////////////////////////
+// Under Linux, the much faster CLOCK_MONOTONIC clock can be used.
+// This clock is more accurate than CLOCK_REALTIME_COARSE and faster than regular clock.
+// Uncomment to use it instead of the regular clock.
+// #define SPDLOG_CLOCK_MONOTONIC
+///////////////////////////////////////////////////////////////////////////////
+
+
 ///////////////////////////////////////////////////////////////////////////////
 // Uncomment if date/time logging is not needed.
 // This will prevent spdlog from quering the clock on each log call.