Swift: flush log files on log flushing

Author: redsun82

swift/extractor/infra/log/SwiftLogging.cpp

@@ -134,6 +134,12 @@ void Log::configure() {
 
 void Log::flushImpl() {
   session.consume(*this);
+  if (text) {
+    textFile.flush();
+  }
+  if (binary) {
+    binary.output.flush();
+  }
 }
 
 Log::LoggerConfiguration Log::getLoggerConfigurationImpl(std::string_view name) {