Replace YellowBox references with LogBox

Summary:
This diff replaces some YellowBox references with LogBox so we can remove it.

Changelog: [Internal]

Reviewed By: motiz88

Differential Revision: D19948126

fbshipit-source-id: b26ad1b78d86a8290f7e08396e4a8314fef7a9f3

Libraries/Utilities/RCTLog.js

@@ -29,7 +29,7 @@ const RCTLog = {
     if (typeof global.nativeLoggingHook === 'undefined') {
       RCTLog.logToConsole(level, ...args);
     } else {
-      // Report native warnings to YellowBox
+      // Report native warnings to LogBox
       if (warningHandler && level === 'warn') {
         warningHandler(...args);
       }