Work around javadoc 11.0.2 bug
Work around javadoc 11.0.2 bug

Summary: Quick workaround for [JDK-8212233](https://bugs.openjdk.java.net/browse/JDK-8212233), causing `javadoc` to fail in Java 11 Buck builds, but only with Java version 11.0.2.

Reviewed By: rajyengi

fbshipit-source-id: 9b774db4d1

kageiit/buck,nguyentruongtho/buck,JoelMarcey/buck,JoelMarcey/buck,zpao/buck,JoelMarcey/buck,kageiit/buck,facebook/buck,Addepar/buck,JoelMarcey/buck,Addepar/buck,nguyentruongtho/buck,facebook/buck,kageiit/buck,JoelMarcey/buck,facebook/buck,JoelMarcey/buck,JoelMarcey/buck,facebook/buck,JoelMarcey/buck,zpao/buck,kageiit/buck,nguyentruongtho/buck,kageiit/buck,JoelMarcey/buck,Addepar/buck,nguyentruongtho/buck,zpao/buck,Addepar/buck,Addepar/buck,kageiit/buck,Addepar/buck,JoelMarcey/buck,zpao/buck,nguyentruongtho/buck,nguyentruongtho/buck,Addepar/buck,zpao/buck,kageiit/buck,nguyentruongtho/buck,JoelMarcey/buck,facebook/buck,Addepar/buck,zpao/buck,zpao/buck,Addepar/buck,Addepar/buck,Addepar/buck,JoelMarcey/buck,facebook/buck,facebook/buck,Addepar/buck,Addepar/buck,JoelMarcey/buck