meta-facebook: switch '/usr/share' to datadir

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I7b3ad5e0a59424110790ae53cacceee4d7d4a646
diff --git a/meta-facebook/recipes-phosphor/ipmi/phosphor-ipmi-ipmb_%.bbappend b/meta-facebook/recipes-phosphor/ipmi/phosphor-ipmi-ipmb_%.bbappend
index 9557c26..44eefb0 100644
--- a/meta-facebook/recipes-phosphor/ipmi/phosphor-ipmi-ipmb_%.bbappend
+++ b/meta-facebook/recipes-phosphor/ipmi/phosphor-ipmi-ipmb_%.bbappend
@@ -4,5 +4,5 @@
 
 do_install:append() {
     install -m 0644 -D ${WORKDIR}/ipmb-channels.json \
-                   ${D}/usr/share/ipmbbridge
+                   ${D}${datadir}/ipmbbridge
 }