hg: jdk/jdk: 2 new changesets

[claes.redestad at oracle.com]

Changeset: b30ee5972c61
Author:    redestad
Date:      2020-05-28 00:34 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/b30ee5972c61

8245959: Extend String concat testing to account for folded constants
Reviewed-by: psandoz

! test/jdk/java/lang/String/concat/ImplicitStringConcatShapes-head.template
! test/jdk/java/lang/String/concat/ImplicitStringConcatShapes.java
! test/jdk/java/lang/String/concat/ImplicitStringConcatShapesTestGen.java

Changeset: 6150c0ab4ffa
Author:    redestad
Date:      2020-05-28 00:35 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/6150c0ab4ffa

8245969: Simplify String concat constant folding
Reviewed-by: psandoz, forax

! src/java.base/share/classes/java/lang/StringConcatHelper.java
! src/java.base/share/classes/java/lang/invoke/StringConcatFactory.java