Revert "Revert "lambda: Experimental support for capture-variable and liberate-variable""

This reverts commit 7bbb80ab52c203e44d2ded2c947b3b03b4b31ec4.

Change-Id: If806ce5c6c5e96fdb2c3761dee096f74e7e5b001
diff --git a/runtime/Android.mk b/runtime/Android.mk
index 995a1d5..059c4cd 100644
--- a/runtime/Android.mk
+++ b/runtime/Android.mk
@@ -104,6 +104,7 @@
   lambda/box_table.cc \
   lambda/closure.cc \
   lambda/closure_builder.cc \
+  lambda/leaking_allocator.cc \
   jni_internal.cc \
   jobject_comparator.cc \
   linear_alloc.cc \