git: openjdk/jdk: 8268296: ScopedMemoryAccess build error with readonly filesystems

[Liam Miller-Cushon]

Changeset: e546ae27
Author:    Liam Miller-Cushon <cushon at openjdk.org>
Date:      2021-06-07 17:58:57 +0000
URL:       https://git.openjdk.java.net/jdk/commit/e546ae27ffc6c19ae078a41ab6e1741a104958c1

8268296: ScopedMemoryAccess build error with readonly filesystems

Reviewed-by: erikj

! make/modules/java.base/gensrc/GensrcScopedMemoryAccess.gmk