git: openjdk/jdk: 8273153: Consolidate file_exists into os:file_exists

[Yumin Qi]

Changeset: 9732fbe4
Author:    Yumin Qi <minqi at openjdk.org>
Date:      2021-08-31 00:24:05 +0000
URL:       https://git.openjdk.java.net/jdk/commit/9732fbe428c3b6a5422cc94e7295ba5482d1a7a9

8273153: Consolidate file_exists into os:file_exists

Reviewed-by: iklam, ccheung

! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/share/logging/logFileOutput.cpp
! src/hotspot/share/runtime/os.cpp
! src/hotspot/share/runtime/os.hpp