php7-mod-imap: add missing dependency for libpam

When libpam is selected, then mod_imap pulls in a dep to libpam,
and there seems no way to disable it via configure arguments.
So add this dep here conditionally.

Signed-off-by: Lucian Cristian <lucian.cristian@gmail.com>
Signed-off-by: Michael Heimpold <mhei@heimpold.de>

lang/php7/Makefile

@@ -7,7 +7,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=php
 PKG_VERSION:=7.1.12
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_MAINTAINER:=Michael Heimpold <mhei@heimpold.de>
 
@@ -600,7 +600,7 @@ $(eval $(call BuildModule,gettext,Gettext,+PACKAGE_php7-mod-gettext:libintl-full
 $(eval $(call BuildModule,gmp,GMP,+PACKAGE_php7-mod-gmp:libgmp))
 $(eval $(call BuildModule,hash,Hash))
 $(eval $(call BuildModule,iconv,iConv,$(ICONV_DEPENDS)))
-$(eval $(call BuildModule,imap,IMAP,+PACKAGE_php7-mod-imap:libopenssl +PACKAGE_php7-mod-imap:uw-imap))
+$(eval $(call BuildModule,imap,IMAP,+PACKAGE_php7-mod-imap:libopenssl +PACKAGE_libpam:libpam +PACKAGE_php7-mod-imap:uw-imap))
 $(eval $(call BuildModule,intl,Internationalization Functions,+PACKAGE_php7-mod-intl:icu))
 $(eval $(call BuildModule,json,JSON))
 $(eval $(call BuildModule,ldap,LDAP,+PACKAGE_php7-mod-ldap:libopenldap +PACKAGE_php7-mod-ldap:libsasl2))