git: openjdk/babylon: code-reflection: add a pure java (no maven) build option

[Gary Frost]

Changeset: e02b5d42
Branch: code-reflection
Author:    Gary Frost <gfrost at openjdk.org>
Date:      2024-09-28 15:10:37 +0000
URL:       https://git.openjdk.org/babylon/commit/e02b5d423da7596625600dd39d3ab200e26d407d

add a pure java (no maven) build option

! hat/backends/.gitignore
+ hat/bld
! hat/hatrun.bash