...in com_MSC_class.mk now, similar to ecbaf980
for com_GCC_class.mk.  Three libraries built from external sources (for Windows
only) needed adjustment.

Change-Id: Id8976a30b80efff6119afb18ccaf6811fe27d2f8
Reviewed-on: https://gerrit.libreoffice.org/44270Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>