TWRP: fix compiling on Android 7

fixes
cp: cannot create regular file (...)/recovery/root/file_contexts': No such file or directory

Change-Id: I094a0bd242c6eb01e84570fbe49e853098e33a8b
diff --git a/Android.mk b/Android.mk
index 9b91235..df18d7a 100755
--- a/Android.mk
+++ b/Android.mk
@@ -498,8 +498,10 @@
 endif
 endif
 
-ifeq ($(shell test $(PLATFORM_SDK_VERSION) -ge 25; echo $$?),0)
+ifeq ($(shell test $(PLATFORM_SDK_VERSION) -ge 26; echo $$?),0)
     LOCAL_REQUIRED_MODULES += file_contexts_text
+else ifeq ($(shell test $(PLATFORM_SDK_VERSION) -ge 25; echo $$?),0)
+    LOCAL_ADDITIONAL_DEPENDENCIES += file_contexts_text
 endif
 
 ifeq ($(BOARD_CACHEIMAGE_PARTITION_SIZE),)