[ReactNative] Better profiling API + Fix overlaping events

React/Base/RCTLog.h

@@ -45,6 +45,11 @@ typedef void (^RCTLogFunction)(
   NSString *message
 );
 
+/**
+ * Get a given thread's name (or the current queue, iff in debug mode)
+ */
+NSString *RCTThreadName(NSThread *);
+
 /**
  * A method to generate a string from a collection of log data. To omit any
  * particular data from the log, just pass nil or zero for the argument.