Use a single target for generation of .wasm files

CMakeModules/wasm.cmake

@@ -192,8 +192,7 @@ macro(add_wast_executable)
   else()
   endif()
   
-  add_custom_target(${target} ALL DEPENDS ${DESTINATION_FOLDER}/${target}.wast.hpp ${extra_target_dependency})
-  add_custom_target(${target}_wasm ALL DEPENDS ${DESTINATION_FOLDER}/${target}.wasm)
+  add_custom_target(${target} ALL DEPENDS ${DESTINATION_FOLDER}/${target}.wast.hpp ${extra_target_dependency} ${DESTINATION_FOLDER}/${target}.wasm)
   
   set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${DESTINATION_FOLDER}/${target}.wast.hpp)