meta-google: fix timesync timeout

The systemd config path is wrong.

Tested:
```
$ cat /lib/systemd/system/systemd-time-wait-sync.service.d/10-gbmc.conf
[Service]
TimeoutStartSec=1min

$ systemctl status systemd-time-wait-sync.service
x systemd-time-wait-sync.service - Wait Until Kernel Time Synchronized
     Loaded: loaded (/lib/systemd/system/systemd-time-wait-sync.service; disabled; preset: disabled)
    Drop-In: /lib/systemd/system/systemd-time-wait-sync.service.d
             `-10-gbmc.conf
     Active: failed (Result: timeout) since Thu 2023-01-26 02:00:19 PST; 72ms ago
       Docs: man:systemd-time-wait-sync.service(8)
    Process: 5542 ExecStart=/lib/systemd/systemd-time-wait-sync (code=exited, status=0/SUCCESS)
   Main PID: 5542 (code=exited, status=0/SUCCESS)
        CPU: 20ms

Jan 26 01:59:19 gbmc systemd[1]: Starting Wait Until Kernel Time Synchronized...
Jan 26 01:59:19 gbmc systemd-time-wait-sync[5542]: adjtime state 5 status 40 time Thu 2023-01-26 09:59:19.662116 UTC
Jan 26 02:00:19 gbmc systemd[1]: systemd-time-wait-sync.service: start operation timed out. Terminating.
Jan 26 02:00:19 gbmc systemd-time-wait-sync[5542]: Exit without adjtimex synchronized.
Jan 26 02:00:19 gbmc systemd[1]: systemd-time-wait-sync.service: Failed with result 'timeout'.
```

Change-Id: I5b3cfd0b098a376eed162c509f5876bb2025cd77
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/meta-google/recipes-google/systemd/gbmc-systemd-config.bb b/meta-google/recipes-google/systemd/gbmc-systemd-config.bb
index 8809a6e..ef5c1a0 100644
--- a/meta-google/recipes-google/systemd/gbmc-systemd-config.bb
+++ b/meta-google/recipes-google/systemd/gbmc-systemd-config.bb
@@ -24,7 +24,7 @@
   ${libdir}/sysctl.d/40-gbmc-sysctl.conf \
   ${libdir}/sysctl.d/40-gbmc-forward.conf \
   ${systemd_system_unitdir}/sysinit.target.wants/systemd-time-wait-sync.service \
-  ${systemd_system_unitdir}/systemd-time-wait-sync.d/10-gbmc.conf \
+  ${systemd_system_unitdir}/systemd-time-wait-sync.service.d/10-gbmc.conf \
   "
 
 FILES:${PN}:append:dev = " \
@@ -65,8 +65,8 @@
 
   mkdir -p ${D}${systemd_system_unitdir}/sysinit.target.wants/
   ln -sv ${systemd_system_unitdir}/systemd-time-wait-sync.service ${D}${systemd_system_unitdir}/sysinit.target.wants/
-  mkdir -p ${D}${systemd_system_unitdir}/systemd-time-wait-sync.d/
-  install -D -m0644 ${WORKDIR}/10-gbmc.conf ${D}${systemd_system_unitdir}/systemd-time-wait-sync.d/
+  mkdir -p ${D}${systemd_system_unitdir}/systemd-time-wait-sync.service.d/
+  install -D -m0644 ${WORKDIR}/10-gbmc.conf ${D}${systemd_system_unitdir}/systemd-time-wait-sync.service.d/
 }
 
 do_install:append:dev() {