CI/Build: source LCG view if used

(cherry picked from commit b7feae09)

CMakeLists.txt

@@ -157,6 +157,11 @@ CORRYVRECKAN_SETUP_EIGEN_TARGETS()
 SET(CORRYVRECKAN_DEPS_INCLUDE_DIRS ${ROOT_INCLUDE_DIRS})
 SET(CORRYVRECKAN_DEPS_LIBRARIES Eigen3::Eigen ROOT::Core ROOT::GenVector ROOT::Geom ROOT::RIO ROOT::Hist ROOT::Minuit ROOT::Minuit2)
 
+# Add the LCG view as dependency if set:
+IF(DEFINED ENV{LCG_VIEW})
+    ADD_RUNTIME_DEP($ENV{LCG_VIEW})
+ENDIF()
+
 # Add "thisroot.sh" as runtime dependency for setup.sh file:
 ADD_RUNTIME_DEP(thisroot.sh)