Makefile: move commands from distclean to clean and add missing files

There is no reason why generated source files shouldn't be part of the
clean target, as opposed to distclean. On the contrary, having them
in distclean only looks dangerous when trying to deal with broken
dependency rules. Move them to clean, except config.h (which would
require configure to be run again).

Also, some recently added generated files were missing from the clean
targets.

Makefile

@@ -639,12 +639,17 @@ clean:
 	-$(RM) $(call ADD_ALL_DIRS,/*.o /*.d /*.a /*.ho /*~)
 	-$(RM) $(call ADD_ALL_EXESUFS,mplayer)
 	-$(RM) $(MOFILES)
+	-$(RM) version.h
+	-$(RM) codecs.conf.h
+	-$(RM) input/input_conf.h
+	-$(RM) libvo/vdpau_template.c
+	-$(RM) libmpdemux/ebml_types.h libmpdemux/ebml_defs.c
+	-$(RM) libvo/vo_gl3_shaders.h
+	-$(RM) sub/osd_font.h
 
 distclean: clean
 	-$(RM) -r locale
-	-$(RM) config.log config.mak config.h codecs.conf.h version.h TAGS tags
-	-$(RM) libvo/vdpau_template.c
-	-$(RM) libmpdemux/ebml_types.h libmpdemux/ebml_defs.c
+	-$(RM) config.log config.mak config.h TAGS tags
 
 TAGS:
 	$(RM) $@; find . -name '*.[chS]' -o -name '*.asm' | xargs etags -a