libqemustub: add more stubs for qemu-char

Additional stubs:
 - chr_baum_init
 - qemu_chr_open_spice_vmc
 - qemu_chr_open_spice_port
Signed-off-by: NNikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

stubs/Makefile.objs

 stub-obj-y += arch-query-cpu-def.o
 stub-obj-y += bdrv-commit-all.o
+stub-obj-y += chr-baum-init.o
 stub-obj-y += chr-msmouse.o
 stub-obj-y += clock-warp.o
 stub-obj-y += cpu-get-clock.o
@@ -24,6 +25,7 @@ stub-obj-y += mon-set-error.o
 stub-obj-y += monitor-init.o
 stub-obj-y += notify-event.o
 stub-obj-y += pci-drive-hot-add.o
+stub-obj-$(CONFIG_SPICE) += qemu-chr-open-spice.o
 stub-obj-y += qtest.o
 stub-obj-y += reset.o
 stub-obj-y += runstate-check.o

stubs/chr-baum-init.c

+#include "qemu-common.h"
+#include "sysemu/char.h"
+
+CharDriverState *chr_baum_init(void)
+{
+    return NULL;
+}

stubs/qemu-chr-open-spice.c

+#include "qemu-common.h"
+#include "ui/qemu-spice.h"
+
+CharDriverState *qemu_chr_open_spice_vmc(const char *type)
+{
+    return NULL;
+}
+
+#if SPICE_SERVER_VERSION >= 0x000c02
+CharDriverState *qemu_chr_open_spice_port(const char *name)
+{
+    return NULL;
+}
+#endif