Fix make file flag name for minzip

Change-Id: I53380ee203c1fe75d37f24f99e36f5c5a62e5b39
diff --git a/Android.mk b/Android.mk
index 85f8072..ff1f5a2 100644
--- a/Android.mk
+++ b/Android.mk
@@ -359,7 +359,7 @@
     include $(commands_recovery_local_path)/crypto/scrypt/Android.mk
     include $(commands_recovery_local_path)/crypto/crypttools/Android.mk
 endif
-ifeq ($(HAVE_SELINUX), true)
+ifeq ($(TWHAVE_SELINUX), true)
     include $(commands_recovery_local_path)/minzip/Android.mk
 else
     include $(commands_recovery_local_path)/minzipold/Android.mk