RFR: 8309778: (fs) Failed to create a symbolic link due to relative path

[yaqsun]

Low risk, only test changes. 
java.nio.file.NoSuchFileException: ./name1692782213124882428/link when it is a different volume/file system.
machine info:

文件系统       类型      容量  已用  可用 已用% 挂载点
devtmpfs       devtmpfs  7.9G     0  7.9G    0% /dev
tmpfs          tmpfs     7.9G  245M  7.7G    4% /dev/shm
tmpfs          tmpfs     7.9G  893M  7.1G   12% /run
tmpfs          tmpfs     5.0M   16K  5.0M    1% /run/lock
tmpfs          tmpfs     7.9G     0  7.9G    0% /sys/fs/cgroup
/dev/nvme0n1p3 xfs        42G   24G   18G   58% /
/dev/nvme0n1p5 xfs       147G   25G  123G   17% /data
/dev/nvme0n1p2 ext3      283M   42M  227M   16% /boot
/dev/nvme0n1p1 vfat      300M  724K  299M    1% /boot/efi
tmpfs          tmpfs     1.6G  160K  1.6G    1% /run/user/1001
/dev/sda1      ext4      1.8T  913G  827G   53% /home/loongson/test-file

-------------

Commit messages:
 - 8309778: [TESTBUG] Failed to create a symbolic link due to relative path

Changes: https://git.openjdk.org/jdk/pull/14436/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14436&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309778
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14436.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14436/head:pull/14436

PR: https://git.openjdk.org/jdk/pull/14436