trivial: Respect alphabetical order of .o files in Makefile.objs

The vmgenid.o is the only file that is not in alphabetical order.

Signed-off-by: Christophe de Dinechin <dinechin@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200629094934.2081180-1-dinechin@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

stubs/Makefile.objs

@@ -19,10 +19,10 @@ stub-obj-y += replay.o
 stub-obj-y += runstate-check.o
 stub-obj-$(CONFIG_SOFTMMU) += semihost.o
 stub-obj-y += set-fd-handler.o
-stub-obj-y += vmgenid.o
 stub-obj-y += sysbus.o
 stub-obj-y += tpm.o
 stub-obj-y += trace-control.o
+stub-obj-y += vmgenid.o
 stub-obj-y += vmstate.o
 stub-obj-$(CONFIG_SOFTMMU) += win32-kbd-hook.o