fixed file upload error message

Author: steffeng

experimental/aws-lambda-java-profiler/extension/src/main/java/com/amazonaws/services/lambda/extension/ExtensionMain.java

@@ -56,7 +56,7 @@ private static void handleShutDown() {
             // no need to stop the profiler as it has been stopped by the shutdown hook
             s3Manager.upload(previousFileSuffix, true);
         } catch (Exception e) {
-            Logger.error("could not start the profiler");
+            Logger.error("could not upload the file");
             throw e;
         }
         System.exit(0);
@@ -133,4 +133,4 @@ private static void stopProfiler(String fileNameSuffix) {
             e.printStackTrace();
         }
     }
-}
+}