profiles: add packages needed to make new stages on Gentoo/FreeBSD

Bug: https://bugs.gentoo.org/598643
Closes: https://github.com/gentoo/gentoo/pull/2705

profiles/default/bsd/fbsd/packages.build

@@ -40,6 +40,7 @@ virtual/editor
 virtual/libc
 virtual/os-headers
 virtual/package-manager
+virtual/pkgconfig
 sys-freebsd/freebsd-mk-defs
 sys-freebsd/freebsd-lib
 sys-freebsd/freebsd-libexec
@@ -48,3 +49,4 @@ sys-freebsd/freebsd-sbin
 sys-freebsd/freebsd-ubin
 sys-freebsd/freebsd-usbin
 sys-freebsd/freebsd-contrib
+sys-libs/timezone-data