sw: apparently CppunitTest_sw_mailmerge needs scfilt library

At least my incremental ASAN build failed because it loaded an outdated
libscfiltlo.so that was still linked against outdated
liborcus-parser-0.11.so causing an odr-violation.

Change-Id: I4a4e134ab14503b15742138e9c4c29cb2b98d655

sw/CppunitTest_sw_mailmerge.mk

@@ -54,6 +54,7 @@ $(eval $(call gb_CppunitTest_use_components,sw_mailmerge, \
     package/util/package2 \
     sax/source/expatwrap/expwrap \
     sc/util/sc \
+    sc/util/scfilt \
     sfx2/util/sfx \
     sot/util/sot \
     svl/source/fsstor/fsstorage \