secure-boot: add service to run new secure check

Tested:
- Built image with new service installed and verified that when
  QuiesceOnHwError was not set, we just got this:
Mar 18 16:09:46 p10bmc systemd[1]: Starting Phosphor BMC Security Check...
Mar 18 16:09:46 p10bmc phosphor-secure-boot-check[435]: bmc-secure-boot gpio found and indicates it is NOT enabled
Mar 18 16:09:46 p10bmc phosphor-secure-boot-check[435]: Read 0 from secure_boot
Mar 18 16:09:46 p10bmc phosphor-secure-boot-check[435]: Read 0 from abr_image
Mar 18 16:09:47 p10bmc systemd[1]: Finished Phosphor BMC Security Check.

- When QuiesceOnHwError was set, we got this:
Mar 18 16:37:10 p10bmc systemd[1]: Starting Phosphor BMC Security Check...
Mar 18 16:37:10 p10bmc phosphor-secure-boot-check[1001]: bmc-secure-boot gpio found and indicates it is NOT enabled
Mar 18 16:37:10 p10bmc phosphor-secure-boot-check[1001]: Read 0 from secure_boot
Mar 18 16:37:10 p10bmc phosphor-secure-boot-check[1001]: Read 0 from abr_image
Mar 18 16:37:10 p10bmc phosphor-secure-boot-check[1001]: The system is not secure
Mar 18 16:37:10 p10bmc systemd[1]: Finished Phosphor BMC Security Check.

AND a log:
"Severity" : {
        "type" : "s",
        "data" : "xyz.openbmc_project.Logging.Entry.Level.Warning"
},
"Message" : {
        "type" : "s",
        "data" : "xyz.openbmc_project.State.Error.SecurityCheckFail"
},
"EventId" : {
        "type" : "s",
        "data" : "BD8D3405 00000055 2E2D0010 00000000 00000000 00000000 00000000 00000000 00000000"
},
"AdditionalData" : {
        "type" : "as",
        "data" : [
                "SECURE_BOOT_GPIO=0",
                "SYSFS_ABR_IMAGE_VAL=0",
                "SYSFS_SECURE_BOOT_VAL=0",
                "_PID=1001"
        ]
},

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I6513280d30672907341b8f3fc583644ebec4cdc5
diff --git a/service_files/meson.build b/service_files/meson.build
index f6ff41a..18e33ea 100644
--- a/service_files/meson.build
+++ b/service_files/meson.build
@@ -14,7 +14,8 @@
     'phosphor-clear-one-time@.service',
     'phosphor-set-host-transition-to-off@.service',
     'phosphor-set-host-transition-to-running@.service',
-    'phosphor-chassis-check-power-status@.service'
+    'phosphor-chassis-check-power-status@.service',
+    'phosphor-bmc-security-check.service'
 ]
 
 foreach u : unit_files