Add android-info.txt to the dist dir.

Change-Id: I735655205085b0baf490b0dd011eb59cb6d4c45b
http://b/issue?id=2524072
diff --git a/core/main.mk b/core/main.mk
index 688ad9d..b1a5bff 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -689,6 +689,7 @@
 	$(INSTALLED_FILES_FILE) \
 	$(INSTALLED_BUILD_PROP_TARGET) \
 	$(BUILT_TARGET_FILES_PACKAGE) \
+	$(INSTALLED_ANDROID_INFO_TXT_TARGET) \
  )
 
 # Tests are installed in userdata.img.  If we're building the tests