remove duplicate references to sources which are also in ${ICE_COMMON_SRCS}.
remove duplicate references to sources which are also in ${ICE_COMMON_SRCS}.

dicej/icewm,bedna-KU/icewm,dicej/icewm,bedna-KU/icewm,bedna-KU/icewm,dicej/icewm,dicej/icewm