git: openjdk/mobile: 8245024: Simplify and eagerly initialize StringConcatFactory

[duke]

Changeset: 82f2a0e2
Author:    Claes Redestad <redestad at openjdk.org>
Date:      2020-05-15 12:25:37 +0000
URL:       https://git.openjdk.java.net/mobile/commit/82f2a0e2

8245024: Simplify and eagerly initialize StringConcatFactory

Reviewed-by: psandoz

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