hg: jdk/jdk: 8071961: Add javac lint warning when a default constructor is created

[joe.darcy at oracle.com]

Changeset: f74d10596242
Author:    darcy
Date:      2020-08-17 18:58 -0700
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/f74d10596242

8071961: Add javac lint warning when a default constructor is created
Reviewed-by: jjg, jlahoda, abuckley, erikj, mcimadamore

! make/CompileJavaModules.gmk
! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Lint.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Check.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/TypeEnter.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties
! src/jdk.compiler/share/classes/com/sun/tools/javac/resources/javac.properties
+ test/langtools/tools/javac/diags/examples/WarnDefaultCtor/DefaultCtor.java
+ test/langtools/tools/javac/diags/examples/WarnDefaultCtor/modulesourcepath/defaultctor/module-info.java
+ test/langtools/tools/javac/diags/examples/WarnDefaultCtor/modulesourcepath/defaultctor/pkg/Foo.java
+ test/langtools/tools/javac/warnings/DefaultCtor/DefaultCtorWarningToolBox.java
+ test/langtools/tools/javac/warnings/DefaultCtor/NoWarningCases.java
+ test/langtools/tools/javac/warnings/DefaultCtor/NoWarningRecord.java