git: openjdk/jdk-sandbox: classfile-api-branch: fixed javadoc generation and target location

[Adam Sotona]

Changeset: 42a6fbd8
Author:    Adam Sotona <asotona at openjdk.org>
Date:      2022-12-13 16:45:48 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/42a6fbd8d187af55a1a00b3ab38060613c90a373

fixed javadoc generation and target location

! README.md
! make/Docs.gmk