Issue #28930: Add a Makefile rule for bytes_methods.c.

Add a dependency to stringlib to make sure that bytes_methods.c is
recompiled if stringlib is modified.

Makefile.pre.in

@@ -858,8 +858,8 @@ UNICODE_DEPS = \
 		$(srcdir)/Objects/stringlib/unicode_format.h \
 		$(srcdir)/Objects/stringlib/unicodedefs.h
 
+Objects/bytes_methods.o: $(srcdir)/Objects/bytes_methods.c $(BYTESTR_DEPS)
 Objects/bytesobject.o: $(srcdir)/Objects/bytesobject.c $(BYTESTR_DEPS)
-
 Objects/bytearrayobject.o: $(srcdir)/Objects/bytearrayobject.c $(BYTESTR_DEPS)
 
 Objects/unicodeobject.o: $(srcdir)/Objects/unicodeobject.c $(UNICODE_DEPS)