hg: jdk9/dev/langtools: 8152062: obscure error message for bad 'provides'

[vicente.romero at oracle.com]

Changeset: a8fefe4d1826
Author:    vromero
Date:      2016-05-31 13:00 -0400
URL:       http://hg.openjdk.java.net/jdk9/dev/langtools/rev/a8fefe4d1826

8152062: obscure error message for bad 'provides'
Reviewed-by: jjg

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Modules.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties
+ test/tools/javac/diags/examples/ServiceImplMustBeSubtypeOfServiceIntf/module-info.java
+ test/tools/javac/modules/ObscureMessageForBadProvidesTest.java
! test/tools/javac/modules/ProvidesTest.java