meta-ingrasys: meta-zaius: Cleanup for Yocto override syntax change

Cleanup with
```
convert-overrides.py meta-ingrasys

git grep -l _zaius -- meta-ingrasys \
  | xargs sed -i 's/_zaius/:zaius/'
```

After cleanup
```
$ git grep "_[a-z0-9_/-]*[ :]" -- meta-ingrasys | grep '.bb'
meta-ingrasys/meta-zaius/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend:# compose_list is not defined immediately so don't use :=
```

Signed-off-by: Brandon Kim <brandonkim@google.com>
Change-Id: Ib2da97530167688313ac16aedd69168137788c86
diff --git a/meta-ingrasys/meta-zaius/recipes-phosphor/image/obmc-phosphor-image.bbappend b/meta-ingrasys/meta-zaius/recipes-phosphor/image/obmc-phosphor-image.bbappend
index 7cff3bb..9d13b12 100644
--- a/meta-ingrasys/meta-zaius/recipes-phosphor/image/obmc-phosphor-image.bbappend
+++ b/meta-ingrasys/meta-zaius/recipes-phosphor/image/obmc-phosphor-image.bbappend
@@ -1 +1 @@
-OBMC_IMAGE_EXTRA_INSTALL_append_zaius = " mboxd"
+OBMC_IMAGE_EXTRA_INSTALL:append:zaius = " mboxd"