meta-google: Add smbios-remote-host to allowlist

Instead of individual filenames, adding the containing directory
itself.

Adding the directory used by the gRPC receiver of SMBIOS blobs from
remote hosts, so they can stick around after the smbios-mdr service is
restarted, without requiring hosts to send them again.

As for the gRPC receiver itself, see this patch stack:
https://gerrit.openbmc.org/c/openbmc/smbios-mdr/+/65048

Change-Id: Ic73ab81e3a9761a101b6040a445a5cf042cbb4b0
Signed-off-by: Josh Lehan <krellan@google.com>
diff --git a/meta-google/recipes-phosphor/initrdscripts/obmc-phosphor-initfs/whitelist b/meta-google/recipes-phosphor/initrdscripts/obmc-phosphor-initfs/whitelist
index cc4906c..fbd8b17 100644
--- a/meta-google/recipes-phosphor/initrdscripts/obmc-phosphor-initfs/whitelist
+++ b/meta-google/recipes-phosphor/initrdscripts/obmc-phosphor-initfs/whitelist
@@ -4,5 +4,5 @@
 /etc/systemd/network
 /var/google
 /var/lib/phosphor-inventory-manager
-/var/lib/smbios/smbios2
+/var/lib/smbios
 /var/log/state