hg: jdk/sandbox: Disable usage of check_previous_op for text rendering

[jayathirth.d.v at oracle.com]

Changeset: 6b0febcd7b43
Author:    jdv
Date:      2019-08-08 14:15 +0530
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/6b0febcd7b43

Disable usage of check_previous_op for text rendering

! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLTextRenderer.m
! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLVertexCache.m