Use $(LIBO_SHARE_FOLDER) instead of hardcoded "share"

Change-Id: Ic97e51efaa280c64764b1c5f38c3b87af82a422b

solenv/gbuild/CppunitTest.mk

@@ -43,7 +43,7 @@ gb_CppunitTest_CPPTESTCOMMAND := $(call gb_Executable_get_target_for_build,cppun
 define gb_CppunitTest__make_args
 $(HEADLESS) \
 "-env:BRAND_BASE_DIR=$(call gb_Helper_make_url,$(INSTROOT))" \
-"-env:BRAND_SHARE_SUBDIR=share" \
+"-env:BRAND_SHARE_SUBDIR=$(LIBO_SHARE_FOLDER)" \
 "-env:UserInstallation=$(call gb_Helper_make_url,$(call gb_CppunitTest_get_target,$*).user)" \
 $(if $(URE),\
     $(if $(strip $(CONFIGURATION_LAYERS)),\