include <thread> header (#594)

utils/rocvideodecode/roc_video_dec.h

@@ -35,6 +35,7 @@ THE SOFTWARE.
 #include <cstring>
 #include <unordered_map>
 #include <chrono>
+#include <thread>
 #include <hip/hip_runtime.h>
 #include "rocdecode/rocdecode.h"
 #include "rocdecode/rocparser.h"
@@ -526,4 +527,4 @@ class RocVideoDecoder {
         uint32_t extra_output_file_count_ = 0;
         std::thread::id decoder_session_id_; // Decoder session identifier. Used to gather session level stats.
         std::unordered_map<std::thread::id, double> session_overhead_; // Records session overhead of initialization+deinitialization time. Format is (thread id, duration)
-};
+};