Fix details in .app template
Fix details in .app template

Was using $(MODULES) instead of $(2).

crownedgrouse/erlang.mk,nevar/erlang.mk,a12n/erlang.mk,jj1bdx/erlang.mk,yannayl/erlang.mk,ninenines/erlang.mk,rabbitmq/erlang.mk,ingwinlu/erlang.mk,bsmr-erlang/erlang.mk,KrzysiekJ/erlang.mk,hairyhum/erlang.mk