Force rocrtsts to use Code Object V4

Temporarily force rocrtsts to use Code Object V4 while compiler team is
about to switch the default Code Object to V5. Will switch back to using
default compiler setting once everything is tested/fixed.

Change-Id: I18e5c6771fffd8c60792fc197501d373c7ec22f3

rocrtst/suites/test_common/CMakeLists.txt

@@ -280,7 +280,7 @@ function(build_kernel S_NAME TARG_DEV)
   set(HSACO_TARG_LIST ${HSACO_TARG_LIST} "${KERNEL_DIR}/${SNAME_KERNEL}" PARENT_SCOPE)
   string(SUBSTRING ${TARG_DEV} 3 -1 gfxNum)
   separate_arguments(CLANG_ARG_LIST UNIX_COMMAND
-   "-D ROCRTST_GPU=0x${gfxNum} -x cl -target amdgcn-amd-amdhsa -include ${OPENCL_INC_DIR}opencl-c.h -mcpu=${TARG_DEV} ${BITCODE_ARGS} -cl-std=CL${OPENCL_VER} ${CL_FILE_LIST} -o ${KERNEL_DIR}/${SNAME_KERNEL}")
+   "-D ROCRTST_GPU=0x${gfxNum} -x cl -target amdgcn-amd-amdhsa -include ${OPENCL_INC_DIR}opencl-c.h -mcpu=${TARG_DEV} ${BITCODE_ARGS} -cl-std=CL${OPENCL_VER} -mcode-object-version=4 ${CL_FILE_LIST} -o ${KERNEL_DIR}/${SNAME_KERNEL}")
   add_custom_command(OUTPUT "${KERNEL_DIR}/${SNAME_KERNEL}" COMMAND ${CLANG} ${CLANG_ARG_LIST} DEPENDS ${CL_FILE_LIST} ${CLANG} COMMENT "BUILDING ${KERNEL_DIR}/${SNAME_KERNEL}" VERBATIM)
 endfunction(build_kernel)