update clang path per packaging (#59)

[ROCm/rocjpeg commit: f05d8862c8]

projects/rocjpeg/samples/jpegDecodeMultiThreads/CMakeLists.txt

@@ -36,7 +36,7 @@ endif()
 
 list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/../../cmake)
 list(APPEND CMAKE_PREFIX_PATH ${ROCM_PATH}/hip ${ROCM_PATH})
-set(CMAKE_CXX_COMPILER ${ROCM_PATH}/llvm/bin/clang++)
+set(CMAKE_CXX_COMPILER ${ROCM_PATH}/lib/llvm/bin/clang++)
 
 find_package(HIP QUIET)