Move libnetutils headers into libnetutils.

Change-Id: I8e51b369b7617e780db78c2f77c8e28d0fb93445
diff --git a/libnetutils/Android.mk b/libnetutils/Android.mk
index 2060df4..281b6c8 100644
--- a/libnetutils/Android.mk
+++ b/libnetutils/Android.mk
@@ -16,6 +16,9 @@
 
 LOCAL_CFLAGS := -Werror
 
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+
 include $(BUILD_SHARED_LIBRARY)
 
 include $(CLEAR_VARS)