git: openjdk/jdk: 8281507: Two javac tests have bad jtreg `@clean` tags

[Aleksey Shipilev]

Changeset: 86723d48
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2022-02-28 07:35:19 +0000
URL:       https://git.openjdk.java.net/jdk/commit/86723d4892485651bcae735ed13545ea89b9bb22

8281507: Two javac tests have bad jtreg `@clean` tags

Reviewed-by: darcy

! test/langtools/tools/javac/8074306/TestSyntheticNullChecks.java
! test/langtools/tools/javac/StringConcat/TestIndyStringConcat.java