Apparently missing dependency

Some bots (the Jenkins lo_ubsan, some Jenkins Gerrit Build v2
macosx_clang_dbgutil builds) recently started to fail
CppunitTest_sw_filters_test at least sporadically with an abort() from
Scheduler::ProcessTaskScheduling (vcl/source/app/scheduler.cxx).
ba81ac19 "Report more debug information about
caught exception" reveals that at least <https://ci.libreoffice.org/job/
lo_gerrit/24197/Config=macosx_clang_dbgutil/console> fails because of

> warn:vcl.schedule:90989:529951052:vcl/source/app/scheduler.cxx:452: Uncaught com.sun.star.uno.DeploymentException component context fails to supply service com.sun.star.embed.FileSystemStorageFactory of type com.sun.star.lang.XSingleServiceFactory

Due to the unfortunate try-catch in Scheduler::ProcessTaskScheduling it is hard
to tell where the failure originates (and it only hits some bots and I at least
can't reproduce it locally), but lets assume that a dependency on
svl/source/fsstor/fsstorage.component is indeed missing, but manifests as a
failure only in some cases (for whatever reason).

Change-Id: I91214490ac6aab99a281c745ba4b2d138b12ddd1

sw/CppunitTest_sw_filters_test.mk

@@ -68,6 +68,7 @@ $(eval $(call gb_CppunitTest_use_components,sw_filters_test,\
     sax/source/expatwrap/expwrap \
     sfx2/util/sfx \
 	starmath/util/sm \
+    svl/source/fsstor/fsstorage \
     svtools/util/svt \
     sw/util/msword \
     sw/util/sw \