Bug2799: mod-script-pipe fails to load on Mac...

... This broke at commit 938bbeb with changes in CMake scripts.

This can be fixed by invoking CopyLibs.cmake for modules too.

This affects only the macOS build.

cmake-proxies/cmake-modules/AudacityFunctions.cmake

@@ -359,6 +359,15 @@ function( audacity_module_fn NAME SOURCES IMPORT_TARGETS
             PREFIX ""
             FOLDER "modules" # for IDE organization
       )
+      if( CMAKE_HOST_SYSTEM_NAME MATCHES "Darwin" )
+         add_custom_command(
+	    TARGET ${TARGET}
+            COMMAND ${CMAKE_COMMAND}
+	       -D SRC="${_MODDIR}/${TARGET}.so"
+               -D WXWIN="${_SHARED_PROXY_BASE_PATH}/$<CONFIG>"
+               -P ${AUDACITY_MODULE_PATH}/CopyLibs.cmake
+            POST_BUILD )
+      endif()
    else()
       set( ATTRIBUTES "shape=octagon" )
       set_target_property_all( ${TARGET} ${DIRECTORY_PROPERTY} "${_SHARED_PROXY_PATH}" )