mkbootimg: Add Loki support

* I want my target-files built images to be Loki'd if the device
  needs Loki.
* With this, devices that rely on Loki can ship Lineage Recovery
  officially.
* Import loki_tool from: https://github.com/Stricted/android_external_loki.

Change-Id: I45ef363e05566268c8f24f7e8939a2d785478fbe
diff --git a/Android.mk b/Android.mk
index 69ab1af..b711f94 100644
--- a/Android.mk
+++ b/Android.mk
@@ -35,6 +35,11 @@
 include $(SAM_ROOT)/wifiloader/Android.mk
 endif
 
+# Loki
+ifeq ($(TAGET_NEEDS_LOKI),true)
+include $(SAM_ROOT)/loki_tool/Android.mk
+endif
+
 ifeq ($(BOARD_VENDOR),samsung)
 include $(SAM_ROOT)/AdvancedDisplay/Android.mk
 include $(SAM_ROOT)/audio/Android.mk