Add dex_lang as common frontend to lir and LLVM. dex_lang + bc2lir =
Greenland

First commit of Greenland compiler: It's working in the sense of oat
tests. E.g., mm test-art-host-oat-Fibonacci. It shows the correct
bitcode before lir.

Change-Id: I91cbb02188325eb1fa605ed71ec7108fd2b0dbb9
diff --git a/Android.mk b/Android.mk
index 24e28ac..77e1a71 100644
--- a/Android.mk
+++ b/Android.mk
@@ -36,6 +36,9 @@
 ifeq ($(ART_USE_LLVM_COMPILER),true)
 include $(build_path)/Android.libart-compiler-llvm.mk
 endif
+ifeq ($(ART_USE_GREENLAND_COMPILER),true)
+include $(build_path)/Android.libart-compiler-greenland.mk
+endif
 include $(build_path)/Android.executable.mk
 include $(build_path)/Android.oat.mk