Fix the sim-eng build.

Change-Id: I3e7262220c92b9973da909d94ed3cff59ffc9294
diff --git a/Android.mk b/Android.mk
index b306ea7..f0d15a1 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1,3 +1,6 @@
+# Only use this on the device or emulator.
+ifneq ($(TARGET_SIMULATOR),true)
+
 LOCAL_PATH := $(call my-dir)
 LLVM_ROOT_PATH := external/llvm/llvm
 
@@ -110,3 +113,5 @@
 # ========================================================
 
 include $(call all-makefiles-under,$(LOCAL_PATH))
+
+endif