[build] Install application icons in the system-wide theme

The icon to be used for system menus must be installed in the
system-wide hicolor theme directory (/usr/share/icons/hicolor). So we
install another copy of the folder-sparkleshare icon there. Fixes
bgo#626170.

data/icons/Makefile.am

@@ -1,8 +1,16 @@
 theme = hicolor
-themedir = $(pkgdatadir)/icons/$(theme)
-hicolordir = $(DESTDIR)$(datadir)/icons/hicolor
+system_themedir = $(datadir)/icons/$(theme)
+app_themedir = $(pkgdatadir)/icons/$(theme)
 
-theme_icons =						\
+system_theme_icons =					\
+	apps,folder-sparkleshare-16.png			\
+	apps,folder-sparkleshare-22.png			\
+	apps,folder-sparkleshare-24.png			\
+	apps,folder-sparkleshare-256.png		\
+	apps,folder-sparkleshare-32.png			\
+	apps,folder-sparkleshare-48.png
+
+app_theme_icons =					\
 	animations,process-syncing-sparkleshare-24.png	\
 	animations,process-working-22.png	\
 	places,folder-16.png				\
@@ -31,15 +39,16 @@ install_icon_exec = $(top_srcdir)/build/icon-theme-installer \
 	-t "$(theme)" \
 	-s "$(srcdir)" \
 	-d "x$(DESTDIR)" \
-	-b "$(themedir)" \
 	-m "$(mkinstalldirs)" \
 	-x "$(INSTALL_DATA)"
 
 install-data-local:
-	@-$(install_icon_exec) -i $(theme_icons)
+	@-$(install_icon_exec) -i -b "$(system_themedir)" $(system_theme_icons)
+	@-$(install_icon_exec) -i -b "$(app_themedir)" $(app_theme_icons)
 
 uninstall-hook:
-	@-$(install_icon_exec) -u $(theme_icons)
+	@-$(install_icon_exec) -u -b "$(system_themedir)" $(system_theme_icons)
+	@-$(install_icon_exec) -u -b "$(app_themedir)" $(app_theme_icons)
 
 MAINTAINERCLEANFILES = Makefile.in
 EXTRA_DIST = $(wildcard *.png *.svg)