hg: jdk/jdk: 8248612: Back quotes and double quotes must not be escaped in: Cannot convert \"$unix_path\" to Windows path

[jiefu at tencent.com]

Changeset: f6b7804c6f78
Author:    jiefu
Date:      2020-07-01 10:27 +0800
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/f6b7804c6f78

8248612: Back quotes and double quotes must not be escaped in: Cannot convert \"$unix_path\" to Windows path
Reviewed-by: ihse

! make/autoconf/util_windows.m4