add oox to WITH_GALLERY_BUILD build side

This is needed for WNT/ARM cross build since commit
ce4c154e8b.

Change-Id: I03cf9a2bb3bc505772b1bd2a2d96cd2b29cf14c8
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/144170
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <thorsten.behrens@allotropia.de>

RepositoryModule_build.mk

@@ -70,6 +70,7 @@ $(eval $(call gb_Module_add_moduledirs,cross_toolset,\
 		framework \
 		linguistic \
 		officecfg \
+		oox \
 		package \
 		postprocess \
 		sfx2 \

oox/Module_oox.mk

@@ -11,6 +11,10 @@ $(eval $(call gb_Module_Module,oox))
 
 $(eval $(call gb_Module_add_targets,oox,\
 	CustomTarget_generated \
+))
+
+ifeq ($(gb_Side),host)
+$(eval $(call gb_Module_add_targets,oox,\
     Library_oox \
 	Package_customshapes \
 	Package_generated \
@@ -31,5 +35,6 @@ $(eval $(call gb_Module_add_check_targets,oox,\
 	CppunitTest_oox_shape \
 	CppunitTest_oox_export \
 ))
+endif
 
 # vim: set noet sw=4 ts=4: