Remove plugins and builtins with make uninstall (closes #231)

Makefile.am

@@ -487,6 +487,20 @@ endif
 
 # the opposite of install-{data,exec}-local
 uninstall-local:
+	@for i in "" `$(VLC_CONFIG) --target plugin` ; do if test -n "$$i" ; then \
+	  echo rm -f "$(DESTDIR)$(libdir)/vlc/`echo $$i | sed -e 's,.*modules/\([^/]*\).*,\1,'`/$$(basename $$i$(LIBEXT))" ; \
+	  rm -f "$(DESTDIR)$(libdir)/vlc/`echo $$i | sed -e 's,.*modules/\([^/]*\).*,\1,'`/$$(basename $$i$(LIBEXT))" ; \
+	fi ; done
+	@for i in "" `$(VLC_CONFIG) --target builtin` ; do if test -n "$$i" ; then \
+	  echo rm -f "$(DESTDIR)$(libdir)/vlc/$$(basename $$i)" ; \
+	  rm -f "$(DESTDIR)$(libdir)/vlc/$$(basename $$i)" ; \
+	fi ; done
+if BUILD_MOZILLA
+	@for i in "" `$(VLC_CONFIG) --target builtin pic` ; do if test -n "$$i" ; then \
+	  echo rm -f "$$i" "$(DESTDIR)$(libdir)/vlc/$$(basename $$i)" ; \
+	  rm -f "$$i" "$(DESTDIR)$(libdir)/vlc/$$(basename $$i)" ; \
+	fi ; done
+endif
 	for i in "" $(ALIASES) ; do if test -n "$$i" ; then \
 	  rm -f "$(DESTDIR)$(bindir)/$$i" ; \
 	fi ; done