git: openjdk/babylon: code-reflection: Add env.bash error tracking and update build scripts and docs

[Gary Frost]

Changeset: 6d70f2cc
Branch: code-reflection
Author:    Gary Frost <gfrost at openjdk.org>
Date:      2024-10-23 12:39:01 +0000
URL:       https://git.openjdk.org/babylon/commit/6d70f2cc564df3a54e6a1b27e4a2780be93b00f6

Add env.bash error tracking and update build scripts and docs

! hat/README.md
! hat/bld
! hat/bldr/.gitignore
! hat/docs/hat-01-03-building-hat.md
! hat/env.bash
= hat/maven-build.bash
- hat/mkbldr
! hat/sanity
- hat/sanity.java
- hat/whitespacecheck.bash