meta-facebook: prep for new override syntax

Ran `scripts/contrib/convert-overrides.py` from upstream Yocto and
fixed up a few by hand that were missed.

Tested: Built bletchley and tiogapass.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I0489ba007132901697e4ef1a29b03a3591b3ee3b
diff --git a/meta-facebook/recipes-phosphor/settings/phosphor-settings-manager_%.bbappend b/meta-facebook/recipes-phosphor/settings/phosphor-settings-manager_%.bbappend
index 2b4c4c0..56f43c7 100644
--- a/meta-facebook/recipes-phosphor/settings/phosphor-settings-manager_%.bbappend
+++ b/meta-facebook/recipes-phosphor/settings/phosphor-settings-manager_%.bbappend
@@ -1,2 +1,2 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
-SRC_URI_append_yosemitev2 = " file://settings-manager.override.yml"
+FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
+SRC_URI:append:yosemitev2 = " file://settings-manager.override.yml"