svgio: don't use_library_objects in CppunitTest_svgio_read

==26032==ERROR: AddressSanitizer: odr-violation (0x7f3b41f544a0):
  [1] size=96 'vtable for svgio::svgreader::SvgCharacterNode' master/svgio/source/svgreader/svgcharacternode.cxx
  [2] size=96 'vtable for svgio::svgreader::SvgCharacterNode' master/svgio/source/svgreader/svgcharacternode.cxx
These globals were registered at these points:
  [1]:
    #0 0x43a090 in __asan_register_globals.part.13 (workdir/LinkTarget/Executable/cppunittester+0x43a090)
    #1 0x7f3b31e6e86d in asan.module_ctor (instdir/program/libsvgiolo.so+0x6186d)

  [2]:
    #0 0x43a090 in __asan_register_globals.part.13 (workdir/LinkTarget/Executable/cppunittester+0x43a090)
    #1 0x7f3b41da5bad in asan.module_ctor (workdir/LinkTarget/CppunitTest/libtest_svgio_read.so+0x82bad)

Change-Id: Id2b32936d603ac2ed7df12d7e6f3ade094621578
Reviewed-on: https://gerrit.libreoffice.org/69092Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
Tested-by: Jenkins

svgio/CppunitTest_svgio_read.mk

@@ -23,10 +23,6 @@ $(eval $(call gb_CppunitTest_use_externals,svgio_read,\
     libxml2 \
 ))
 
-$(eval $(call gb_CppunitTest_use_library_objects,svgio_read,\
-    svgio \
-))
-
 $(eval $(call gb_CppunitTest_use_libraries,svgio_read, \
 	basegfx \
 	comphelper \