git: openjdk/jdk11u-dev: 8259485: Document need for short paths when building on Windows

[George Adams]

Changeset: 7f440c28
Author:    George Adams <gdams at openjdk.org>
Date:      2022-11-25 08:49:49 +0000
URL:       https://git.openjdk.org/jdk11u-dev/commit/7f440c2849a3ca08723cc37a312bea37a9ec48ae

8259485: Document need for short paths when building on Windows

Backport-of: 2243a1703b81aba2da0a943fc486e34f635f662c

! doc/building.html
! doc/building.md