net-mgmt, security: add missing SUBDIRs

net-mgmt/prometheus-bird-exporter and security/lfacme were missing
SUBDIR entries in their categories.

Reported by: Antoine Brodin <antoine@freebsd.org>
Reviewed by:	arrowd, kevans
Approved by:	arrowd (ports), kevans (mentor)
Differential Revision:	https://reviews.freebsd.org/D50976

net-mgmt/Makefile

@@ -311,6 +311,7 @@
     SUBDIR += pnp
     SUBDIR += pnp-icinga2
     SUBDIR += portmon
+    SUBDIR += prometheus-bird-exporter
     SUBDIR += prometheus-collectd-exporter
     SUBDIR += prometheus1
     SUBDIR += prometheus2

security/Makefile

@@ -282,6 +282,7 @@
     SUBDIR += lasso
     SUBDIR += lastpass-cli
     SUBDIR += lego
+    SUBDIR += lfacme
     SUBDIR += libaegis
     SUBDIR += libargon2
     SUBDIR += libassuan