hg: jdk/sandbox: 8221738: ErrorFile option does not handle pre-existing error files of the same name

[chris.hegarty at oracle.com]

Changeset: 63ba0b902181
Author:    stuefe
Date:      2019-04-07 09:13 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/63ba0b902181

8221738: ErrorFile option does not handle pre-existing error files of the same name
Reviewed-by: coleenp, clanger

! src/hotspot/share/utilities/vmError.cpp
+ test/hotspot/jtreg/runtime/ErrorHandling/ErrorFileOverwriteTest.java