hook for calling from .docx filter to starmath for writting formulas

Cherry-picked from 2e5e2947

Change-Id: I32f8b03da4edf54e5622096d932dbc2b368f45ff

starmath/Library_sm.mk

@@ -54,7 +54,9 @@ $(eval $(call gb_Library_add_linked_libs,sm,\
         cppuhelper \
         editeng \
         i18npaper \
+        msfilter \
         sal \
+        sax \
         sfx \
         sot \
         svl \