meta-google: authorized-keys-comp: Add package

This adds a startup routine that compiles an authorized_keys file from
multiple locations in the filesystem, allowing for multiple providers
without clashing.

Change-Id: Ib26e04af42f29d42410154fdd809aa3a525fc9d5
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend b/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend
index 0dc37fd..042bb08 100644
--- a/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend
+++ b/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend
@@ -7,6 +7,7 @@
 OBMC_IMAGE_EXTRA_INSTALL_append_gbmc = " iproute2 iproute2-ss"
 OBMC_IMAGE_EXTRA_INSTALL_append_gbmc = " gbmc-systemd-config"
 OBMC_IMAGE_EXTRA_INSTALL_append_gbmc = " gbmc-iperf3"
+OBMC_IMAGE_EXTRA_INSTALL_append_gbmc = " authorized-keys-comp"
 OBMC_IMAGE_EXTRA_INSTALL_append_gbmc = \
   '${@"" if not d.getVar("GBMC_NCSI_IF_NAME") else " gbmc-ncsi-config"}'
 OBMC_IMAGE_EXTRA_INSTALL_append_gbmc = \