git: openjdk/jdk15u-dev: 8226810: Failed to launch JVM because of NullPointerException occured on System.props

[Yuri Nesterenko]

Changeset: d28c7d7e
Author:    Yuri Nesterenko <yan at openjdk.org>
Date:      2021-12-09 10:38:55 +0000
URL:       https://git.openjdk.java.net/jdk15u-dev/commit/d28c7d7e4c7d7fa9beaf5452cb576b7887f368d2

8226810: Failed to launch JVM because of NullPointerException occured on System.props

Backport-of: 5f7ccce0c03b2b814c0bae132d359d9903708496

! make/data/charsetmapping/stdcs-windows