Begin work on FlexRay support

include/icsneo/device/extensions/flexray/symbol.h

@@ -0,0 +1,21 @@
+#ifndef __FLEXRAYSYMBOL_H_
+#define __FLEXRAYSYMBOL_H_
+
+#include <cstdint>
+
+namespace icsneo {
+
+namespace FlexRay {
+
+enum class Symbol {
+	None = 0,
+	Unknown,
+	Wakeup,
+	CAS
+};
+
+} // namespace FlexRay
+
+} // namespace icsneo
+
+#endif // __FLEXRAYSYMBOL_H_