Add exported include dir for libandroid_runtime

The libnativehelper global include dir is being removed.

Bug: 18903857
Change-Id: I6f1bed76372ccedbe7feb4d215ba8c1c0fc0a87f
diff --git a/core/jni/Android.mk b/core/jni/Android.mk
index 45dce2c..202d4fd 100644
--- a/core/jni/Android.mk
+++ b/core/jni/Android.mk
@@ -1,6 +1,5 @@
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
-LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
 
 LOCAL_CFLAGS += -DHAVE_CONFIG_H -DKHTML_NO_EXCEPTIONS -DGKWQ_NO_JAVA
 LOCAL_CFLAGS += -DNO_SUPPORT_JS_BINDING -DQT_NO_WHEELEVENT -DKHTML_NO_XBL
@@ -256,6 +255,9 @@
 # <bionic_tls.h> in com_google_android_gles_jni_GLImpl.cpp
 LOCAL_C_INCLUDES += bionic/libc/private
 
+# AndroidRuntime.h depends on nativehelper/jni.h
+LOCAL_EXPORT_C_INCLUDE_DIRS := libnativehelper/include
+
 LOCAL_MODULE:= libandroid_runtime
 
 # -Wno-unknown-pragmas: necessary for Clang as the GL bindings need to turn