fdo#77229 testcase

We didn't have EMF+ rendering testcases so far, let's see if it works
out to render into a bitmap and then just assert pixel position colors
there. It's better than nothing for missing shapes at least.

Change-Id: I2d1c63fef1127f69af7156ed6c99553845f77c9f

cppcanvas/Module_cppcanvas.mk

@@ -29,6 +29,10 @@ ifeq ($(ENABLE_CAIRO_CANVAS),TRUE)
 $(eval $(call gb_Module_add_check_targets,cppcanvas,\
     CppunitTest_cppcanvas_test \
 ))
+
+$(eval $(call gb_Module_add_slowcheck_targets,cppcanvas,\
+    CppunitTest_cppcanvas_emfplus \
+))
 endif
 
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