linux-pam: install login.pam from here

Instead of installing login.pam (/etc/pam.d/login) from util-linux
conditionally do so unconditionally from linux-pam.
If busybox login is pam-enabled (linux-pam package enabled) it will be
required, otherwise it will lead to a system where login won't work, and
if util-linux is enabled it will supercede busybox login and will be
necesarry regardless.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/linux-pam/linux-pam.mk

@@ -26,8 +26,10 @@ LINUX_PAM_DEPENDENCIES += gettext
 LINUX_PAM_MAKE_OPTS += LIBS=-lintl
 endif
 
-# Install default pam config (deny everything)
+# Install default pam config (deny everything except login)
 define LINUX_PAM_INSTALL_CONFIG
+	$(INSTALL) -m 0644 -D package/linux-pam/login.pam \
+		$(TARGET_DIR)/etc/pam.d/login
 	$(INSTALL) -m 0644 -D package/linux-pam/other.pam \
 		$(TARGET_DIR)/etc/pam.d/other
 endef

package/util-linux/util-linux.mk

@@ -153,8 +153,6 @@ endif
 # Install PAM configuration files
 ifeq ($(BR2_PACKAGE_UTIL_LINUX_LOGIN_UTILS),y)
 define UTIL_LINUX_INSTALL_PAMFILES
-	$(INSTALL) -m 0644 package/util-linux/login.pam \
-		$(TARGET_DIR)/etc/pam.d/login
 	$(INSTALL) -m 0644 package/util-linux/su.pam \
 		$(TARGET_DIR)/etc/pam.d/su
 	$(INSTALL) -m 0644 package/util-linux/su.pam \