Bump libvlccore ABI

(vout and module_config_t changes)

src/Makefile.am

@@ -192,7 +192,7 @@ libvlccore_la_CFLAGS = `$(VLC_CONFIG) --cflags libvlccore` \
 libvlccore_la_LDFLAGS = `$(VLC_CONFIG) --ldflags libvlccore` $(AM_LDFLAGS) \
 	-no-undefined \
 	-export-symbols $(srcdir)/libvlccore.sym \
-	-version-info 4:0:0
+	-version-info 5:0:0
 libvlccore_la_LIBADD = `$(VLC_CONFIG) -libs libvlccore` $(AM_LIBADD) \
 	$(LTLIBINTL) ../compat/libcompat.la
 libvlccore_la_DEPENDENCIES = libvlccore.sym