Fixup vcl build with --without-x

Fix provided by Abhimanyu Singh

Change-Id: I5d87aa76517b1cf9d7464f43b9be236de0e92039
Reviewed-on: https://gerrit.libreoffice.org/16452Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>
(cherry picked from commit d2d18465)

vcl/Library_vcl.mk

@@ -605,6 +605,12 @@ $(eval $(call gb_Library_add_exception_objects,vcl,\
     vcl/unx/generic/printer/ppdparser \
     vcl/null/printerinfomanager \
     vcl/headless/headlessinst \
+    $(vcl_headless_code) \
+    $(vcl_headless_freetype_code) \
+))
+
+$(eval $(call gb_Library_use_libraries,vcl,\
+	basebmp \
 ))
 
 $(eval $(call gb_Library_use_externals,vcl,\