WIP: Include --with-help=html in installation sets

As a first step, include all the instdir/help/* content that comes from
helpcontent2 (there's also some *.xsl files there coming from xmlhelp?) in the
ooo base module:

  instdir/help/default.css
               fuse.js
               help.html
               help.js
               help2.js
               hid2file.js
               index.html
               media/
               normalize.css
               paginathing.js
               en-US/
               <any other locale>/

The locale-independent parts could remain in the ooo base module or could be
split out into some help module (esp. the media/ tree may grow large?).  The
per-locale sub-dirs will definitely need to be split into locale-specific
modules in a next step.

Change-Id: I3e7b1b0e9c965372a23a51ed8ddc809e395fd891
Reviewed-on: https://gerrit.libreoffice.org/53213Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

Repository.mk

@@ -802,10 +802,6 @@ $(eval $(call gb_Helper_register_packages, \
 	test_unittest \
 	cli_basetypes_copy \
 	extras_wordbook \
-	$(if $(ENABLE_HTMLHELP),\
-		helpcontent2_html_static \
-		helpcontent2_html \
-	) \
 	instsetoo_native_setup \
 	$(if $(ENABLE_OOENV),instsetoo_native_ooenv) \
 	postprocess_registry \
@@ -955,6 +951,12 @@ $(eval $(call gb_Helper_register_packages_for_install,ooo,\
 	sfx2_classification \
     $(if $(filter OPENCL,$(BUILD_TYPE)),sc_opencl_runtimetest) \
     $(if $(and $(filter WNT,$(OS)), $(filter X86_64,$(CPUNAME))),twain_dsm) \
+	$(if $(ENABLE_HTMLHELP),\
+		helpcontent2_html \
+		helpcontent2_html_generated \
+		helpcontent2_html_media \
+		helpcontent2_html_static \
+	) \
 ))
 
 $(eval $(call gb_Helper_register_packages_for_install,ooo_fonts,\