Updates to rocDecode and rocJPEG samples (#166)

* Edit CMakeList files and include paths for library headers.

examples/jpegdecode/rocjpeg_samples_utils.h

@@ -41,8 +41,8 @@ namespace fs = std::filesystem;
 #    include <experimental/filesystem>
 namespace fs = std::experimental::filesystem;
 #endif
-#include "rocjpeg.h"
 #include <chrono>
+#include <rocjpeg/rocjpeg.h>
 
 #define CHECK_ROCJPEG(call)                                                              \
     {                                                                                    \
@@ -900,4 +900,4 @@ protected:
     std::queue<std::function<void()>> decode_jobs_queue_;
     std::vector<std::thread>          threads_;
 };
-#endif  // ROC_JPEG_SAMPLES_COMMON
+#endif  // ROC_JPEG_SAMPLES_COMMON