fscrypt: integrate v1 processing into TWRP

Change-Id: I3bf9c14b818f9c3e0570c44c82bf0769fcec907f
diff --git a/crypto/fscrypt/Android.mk b/crypto/fscrypt/Android.mk
index a10a7e6..d9fb6ef 100755
--- a/crypto/fscrypt/Android.mk
+++ b/crypto/fscrypt/Android.mk
@@ -36,6 +36,12 @@
     system/extras/f2fs_utils/ \
     bootable/recovery/bootloader_message/include
 
+ifeq  ($(TW_USE_FSCRYPT_POLICY), 1)
+    LOCAL_CFLAGS += -DUSE_FSCRYPT_POLICY_V1
+else
+    LOCAL_CFLAGS += -DUSE_FSCRYPT_POLICY_V2
+endif
+
 ifneq ($(wildcard hardware/libhardware/include/hardware/keymaster0.h),)
     LOCAL_CFLAGS += -DTW_CRYPTO_HAVE_KEYMASTERX
     LOCAL_C_INCLUDES +=  external/boringssl/src/include