[baseimage]: Logrotate for wtmp and btmp files. (#8743)

Added logrotate file for wtmp and btmp to override default conf and set size cap as 100K as done in 
PR: #865. For buster this is control by separate file wtmp and btmp.

Signed-off-by: Abhishek Dosi <[email protected]>

Author: abdosi

files/image_config/logrotate/logrotate.d/btmp

@@ -0,0 +1,7 @@
+# no packages own btmp -- we'll rotate it here
+/var/log/btmp {
+    missingok
+    size 100k
+    create 0660 root utmp
+    rotate 1
+}

files/image_config/logrotate/logrotate.d/wtmp

@@ -0,0 +1,7 @@
+# no packages own wtmp -- we'll rotate it here
+/var/log/wtmp {
+    missingok
+    size 100k
+    create 0664 root utmp
+    rotate 1
+}