hg: jdk/jdk: 8193107: javadoc complains about empty module

[kumar.x.srinivasan at oracle.com]

Changeset: 111104f1e033
Author:    ksrini
Date:      2017-12-12 14:16 -0800
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/111104f1e033

8193107: javadoc complains about empty module
Reviewed-by: jjg

! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/HtmlDoclet.java
! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/AbstractDoclet.java
+ test/langtools/jdk/javadoc/doclet/testModules/TestEmptyModule.java