meta-phosphor: systemd: enable pstore

pstore is now a separate PACKAGECONFIG, which we want enabled by
default.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I0679bcc96ab9be84151ea5df2c6c5b2aed24dde3
diff --git a/meta-phosphor/recipes-core/systemd/systemd_%.bbappend b/meta-phosphor/recipes-core/systemd/systemd_%.bbappend
index eab2ad4..0362166 100644
--- a/meta-phosphor/recipes-core/systemd/systemd_%.bbappend
+++ b/meta-phosphor/recipes-core/systemd/systemd_%.bbappend
@@ -6,6 +6,7 @@
         networkd \
         nss \
         pam \
+        pstore \
         randomseed \
         resolved \
         seccomp \