crypto: fix build in < 5.0 tree

Change-Id: Ie4ed3e91cfb7e509bac1d6db885bd3f415d2b168
diff --git a/crypto/lollipop/Android.mk b/crypto/lollipop/Android.mk
index da25eac..fb98609 100644
--- a/crypto/lollipop/Android.mk
+++ b/crypto/lollipop/Android.mk
@@ -1,5 +1,5 @@
 LOCAL_PATH := $(call my-dir)
-ifeq ($(TW_INCLUDE_L_CRYPTO), true)
+ifeq ($(TW_INCLUDE_CRYPTO), true)
 include $(CLEAR_VARS)
 
 common_c_includes := \