Don't throw errors for Watchman not found

Summary: Changelog: Don't throw an error if Watchman was not found

Reviewed By: aigoncharov

Differential Revision: D48778121

fbshipit-source-id: bfe3599e41d8c6fbe4ea89393ace5213914a2611

desktop/flipper-common/src/utils/LoggerTailer.tsx

@@ -70,6 +70,10 @@ function transformLogLevel(level: LoggerTypes, message: string) {
     if (message.endsWith('Network Error')) {
       return 'warn';
     }
+
+    if (message.includes('Watchman was not found in PATH')) {
+      return 'warn';
+    }
   }
 
   return level;