Refactor logging in Minijail.

That way, the syscall filtering module can log to syslog without
duplicating code. While I'm at it, make naming more consistent.

BUG=None
TEST=unit
TEST=security_Minijail0, security_Minijail_seccomp, platform_CrosDisksArchive

Change-Id: I7102ca22f49dd7e5bb56bf2997d0d83cb0507e83
Reviewed-on: https://gerrit.chromium.org/gerrit/29080
Tested-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Commit-Ready: Jorge Lucangeli Obes <jorgelo@chromium.org>
diff --git a/bpf.h b/bpf.h
index cff5b1a..04ece14 100644
--- a/bpf.h
+++ b/bpf.h
@@ -183,4 +183,4 @@
 void dump_bpf_prog(struct sock_fprog *fprog);
 void dump_bpf_filter(struct sock_filter *filter, unsigned short len);
 
-#endif /* _MINIJAIL_BPF_H_ */
+#endif /* BPF_H */