bundles: add compatibility string for SECO B68

I missed this in the earlier patch-set. I've added a note to the RAUC
recipe to allow people to notice this better than by trial and error.

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@huawei.com>

meta-oniro-core/recipes-core/bundles/oniro-bundle-base.bb

@@ -9,6 +9,7 @@ SUMMARY = "SysOTA/RAUC Update Bundle for Oniro Base Image"
 RAUC_BUNDLE_COMPATIBLE:qemux86 = "QEMU x86"
 RAUC_BUNDLE_COMPATIBLE:qemux86-64 = "QEMU x86-64"
 RAUC_BUNDLE_COMPATIBLE:raspberrypi4-64 = "Raspberry Pi 4"
+RAUC_BUNDLE_COMPATIBLE:seco-intel-b68 := "SECO Alvin"
 # TODO: add compatibility strings for other machines.
 
 RAUC_BUNDLE_DESCRIPTION = "SysOTA/RAUC Update Bundle"