gdm: fix build without the pam option.

conditionalize PLIST for pam stuff. While here, also use vt05 on
aarch64 (which is where I am trying this).

gdm/Makefile

@@ -95,7 +95,8 @@ GDMGRP=		daemon
 # will receive key presses.  And on slow machines, X will have lost access
 # to the keyboard.
 .if (${OPSYS} == "NetBSD" || ${OPSYS} == "OpenBSD") && \
-    (${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "x86_64")
+    (${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "x86_64" || \
+     ${MACHINE_ARCH} == "aarch64")
 CONFIGURE_ARGS+=	X_SERVER_ARGS="vt05"
 .endif
 

gdm/PLIST

@@ -23,12 +23,12 @@ share/examples/gdm/PostSession/Default
 share/examples/gdm/PreSession/Default
 share/examples/gdm/Xsession
 share/examples/gdm/custom.conf
-share/examples/gdm/pam.d/gdm-autologin
-share/examples/gdm/pam.d/gdm-fingerprint
-share/examples/gdm/pam.d/gdm-launch-environment
-share/examples/gdm/pam.d/gdm-password
-share/examples/gdm/pam.d/gdm-pin
-share/examples/gdm/pam.d/gdm-smartcard
+${PLIST.pam}share/examples/gdm/pam.d/gdm-autologin
+${PLIST.pam}share/examples/gdm/pam.d/gdm-fingerprint
+${PLIST.pam}share/examples/gdm/pam.d/gdm-launch-environment
+${PLIST.pam}share/examples/gdm/pam.d/gdm-password
+${PLIST.pam}share/examples/gdm/pam.d/gdm-pin
+${PLIST.pam}share/examples/gdm/pam.d/gdm-smartcard
 share/examples/pam.d/gdm-launch-environment
 share/gdm/BuiltInSessions/custom.desktop
 share/gdm/gdb-cmd

gdm/options.mk

@@ -21,9 +21,12 @@ CONFIGURE_ARGS+=	--with-console-kit=yes
 CONFIGURE_ARGS+=	--with-console-kit=no
 .endif
 
+PLIST_VARS+=		pam
+
 .if !empty(PKG_OPTIONS:Mpam)
 .  include "../../mk/pam.buildlink3.mk"
 CONFIGURE_ARGS+=	--enable-authentication-scheme=pam
+PLIST.pam=		yes
 .elif exists(/etc/shadow)
 CONFIGURE_ARGS+=	--enable-authentication-scheme=shadow
 .else