config-post.h:fix a typo

Signed-off-by: NNitesh Konkar <nitkon12@linux.vnet.ibm.com>

config-post.h

@@ -20,7 +20,7 @@
  * Since virt-login-shell will be setuid, we must do everything
  * we can to avoid linking to other libraries. Many of them do
  * unsafe things in functions marked __atttribute__((constructor)).
- * The only way avoid to avoid such deps is to re-compile the
+ * The only way to avoid such deps is to re-compile the
  * functions with the code in question disabled, and for that we
  * must override the main config.h rules. Hence this file :-(
  */