docs: fix dist/distcheck issues with camerabin figures

Move figures into docs/plugins as well, to avoid issues with
make dist and make distcheck (make distdir will not first descend
into child directories). Out-of-source build seems to still work
as well.

configure.ac

@@ -1775,7 +1775,6 @@ ext/zbar/Makefile
 po/Makefile.in
 docs/Makefile
 docs/plugins/Makefile
-docs/plugins/figures/Makefile
 docs/version.entities
 pkgconfig/Makefile
 pkgconfig/gstreamer-plugins-bad.pc

docs/plugins/Makefile.am

@@ -169,7 +169,7 @@ EXTRA_HFILES = \
 	$(top_srcdir)/gst-libs/gst/interfaces/photography.h
 
 # Images to copy into HTML directory.
-HTML_IMAGES = figures/*.png
+HTML_IMAGES = camerabin.png
 
 # Extra SGML files that are included by $(DOC_MAIN_SGML_FILE).
 content_files =
@@ -192,4 +192,14 @@ DOC_OVERRIDES =
 
 include $(top_srcdir)/common/gtk-doc-plugins.mak
 
-SUBDIRS = figures
+SUBDIRS =
+
+FIGURES_SOURCEFILES = camerabin.dot
+FIGURES_IMAGES      = camerabin.png
+
+EXTRA_DIST += $(FIGURES_SOURCEFILES)
+
+.dot.png:
+	dot -Tpng $< -o$@
+
+update-figures: $(FIGURES_IMAGES)

docs/plugins/figures/Makefile.am

@@ -1,12 +0,0 @@
-SOURCES=camerabin.dot
-IMAGES =camerabin.png
-
-EXTRA_DIST=$(SOURCES)
-
-.PHONY: update
-
-.dot.png:
-	dot -Tpng $< -o$@
-
-update: $(IMAGES)
-