[PWGLF,PWGMM] Add generator-level vs reco-level flattenicity task

PWGMM/UE/Tasks/CMakeLists.txt

@@ -1,4 +1,4 @@
 # Copyright 2019-2020 CERN and copyright holders of ALICE O2.
 # See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
 # All rights not expressly granted are reserved.
 #
@@ -9,12 +9,12 @@
 # granted to it by virtue of its status as an Intergovernmental Organization
 # or submit itself to any jurisdiction.
 
 o2physics_add_dpl_workflow(ue-charged
                     SOURCES uecharged.cxx
                     PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::AnalysisCore
                     COMPONENT_NAME Analysis)
 
 o2physics_add_dpl_workflow(ue-zdc-analysis
                     SOURCES ue-zdc-analysys.cxx
                     PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::AnalysisCore
                     COMPONENT_NAME Analysis)
@@ -22,4 +22,9 @@
 o2physics_add_dpl_workflow(dedx-analysis
                     SOURCES dedxAnalysis.cxx
                     PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::AnalysisCore
-                    COMPONENT_NAME Analysis)
+                    COMPONENT_NAME Analysis)
+
+o2physics_add_dpl_workflow(flattenicity-task
+                    SOURCES flattenicityTask.cxx
+                    PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::AnalysisCore
+                    COMPONENT_NAME Analysis)