Supporting change for aosp/771168

Submitting the change above before this one will "work" for now but we
want to pass vbmeta.img instead of system.img for the more robust
solution.

Bug: 78113934
Test: Built on my local machine.  Asserted that VerifiedBootParams.proto
exists.  Asserted that the emulator boots correctly with this file.

Change-Id: Ie91f49a3c7d49fc667e3f12e7e3866c3d9eb1960
diff --git a/core/Makefile b/core/Makefile
index dabb86d..f7f6f35 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -3945,7 +3945,7 @@
 MK_VERIFIED_BOOT_KERNEL_CMDLINE_SH := device/generic/goldfish/tools/mk_verified_boot_params.sh
 $(QEMU_VERIFIED_BOOT_PARAMS): $(INSTALLED_QEMU_SYSTEMIMAGE) $(MK_VERIFIED_BOOT_KERNEL_CMDLINE_SH) $(INSTALLED_VBMETAIMAGE_TARGET) $(SGDISK_HOST) $(AVBTOOL)
 	@echo Creating $@
-	(export SGDISK=$(SGDISK_HOST) AVBTOOL=$(AVBTOOL); $(MK_VERIFIED_BOOT_KERNEL_CMDLINE_SH) $(INSTALLED_SYSTEMIMAGE_TARGET) $(INSTALLED_QEMU_SYSTEMIMAGE) $(QEMU_VERIFIED_BOOT_PARAMS))
+	(export SGDISK=$(SGDISK_HOST) AVBTOOL=$(AVBTOOL); $(MK_VERIFIED_BOOT_KERNEL_CMDLINE_SH) $(INSTALLED_VBMETAIMAGE_TARGET) $(INSTALLED_QEMU_SYSTEMIMAGE) $(QEMU_VERIFIED_BOOT_PARAMS))
 
 
 systemimage: $(QEMU_VERIFIED_BOOT_PARAMS)