hg: jdk/sandbox: 8215699: -Xlog::file cannot be used with named pipe

[chris.hegarty at oracle.com]

Changeset: 55cee96fefec
Author:    hseigel
Date:      2019-01-17 08:48 -0500
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/55cee96fefec

8215699: -Xlog::file cannot be used with named pipe
Summary: If the log file is a named pipe then change the default file_count to zero so no log file rotation is attempted.
Reviewed-by: lfoltan, coleenp

! src/hotspot/os/windows/os_windows.cpp
! src/hotspot/os/windows/os_windows.hpp
! src/hotspot/share/logging/logFileOutput.cpp
! src/hotspot/share/logging/logFileOutput.hpp