AUB CSR to flush file stream on every enqueue call

This commit adds an explicit flush on AUB file stream to CSR flush method.

Change-Id: Ib491718dba6c7b4a5b1e173111830bd3ab72a3d0

runtime/command_stream/aub_command_stream_receiver.cpp

@@ -84,6 +84,10 @@ void AubFileStream::write(const char *data, size_t size) {
     fileHandle.write(data, size);
 }
 
+void AubFileStream::flush() {
+    fileHandle.flush();
+}
+
 bool AubFileStream::init(uint32_t stepping, uint32_t device) {
     CmdServicesMemTraceVersion header;
     memset(&header, 0, sizeof(header));

runtime/command_stream/aub_command_stream_receiver_hw.inl

@@ -420,6 +420,7 @@ FlushStamp AUBCommandStreamReceiverHw<GfxFamily>::flush(BatchBuffer &batchBuffer
         subCaptureManager->deactivateSubCapture();
     }
 
+    stream->flush();
     return 0;
 }