Adjust invocation of flamegraphs

Author: HLilit

cmake/modules/AddRootBench.cmake

@@ -49,7 +49,7 @@ function(RB_ADD_GBENCHMARK benchmark)
     set(postcmd POSTCMD ${ARG_POSTCMD})
   endif()
   if(flamegraph)
-      set(postcmd ${postcmd} "${PROJECT_SOURCE_DIR}/rootbench-scripts/flamegraph.sh ${PROJECT_BINARY_DIR} -b ${CMAKE_CURRENT_BINARY_DIR}/${benchmark}")
+      set(postcmd ${postcmd} "${PROJECT_SOURCE_DIR}/rootbench-scripts/flamegraph.sh -d ${PROJECT_BINARY_DIR} -b ${CMAKE_CURRENT_BINARY_DIR}/${benchmark}")
       add_dependencies(${benchmark} flamegraph-download)
   endif()
   if(${ARG_LABEL} STREQUAL "long")