oniro-linux.conf: Specify bootindex for qemu root devices

Without bootindex option qemu doesn't respect boot order when
booting with EFI and writes wrong boot order information into the ovmf
image which breaks boot order permanently.

Signed-off-by: Pavel Zhukov <pavel.zhukov@huawei.com>

meta-oniro-core/conf/distro/oniro-linux.conf

@@ -91,6 +91,11 @@ EFI_PROVIDER = "grub-efi"
 MACHINE_FEATURES:qemux86-64 += "efi"
 MACHINE_FEATURES:qemux86 += "efi"
 
+# Add bootindex to qemu boot device to prevent boot order from being changed in ovmf file
+# and not break boot order with EFI. See qemuboot.bbclass for more information
+QB_ROOTFS_EXTRA_OPT:qemux86-64 += ",bootindex=0"
+QB_ROOTFS_EXTRA_OPT:qemux86 += ",bootindex=0"
+
 # Install the grubenv file deployed by oniro-grub-bootconf package into the EFI partition.
 IMAGE_EFI_BOOT_FILES += "grubenv;EFI/BOOT/grubenv"