Windows, launcher: separate jvm_flags by TAB

When Bazel embeds the jvm_flags data into the
java_binary launcher, it will now join the flags
on TAB instead of on space.

While TAB is just as much a legal character in
flags as space is, it is probably rarer, and as
such it's a slightly safer choice than joining the
flags on space (and thus losing the ability to
support flags with spaces in them).

This is a follow-up to https://github.com/bazelbuild/bazel/pull/7411

Next steps:

- Update Bazel to Bash-tokenize the jvm_flags
  before embedding them in the launcher. This is
  required because the jvm_flags attribute should
  support Bash-tokenization (according to the
  Build Encyclopedia).

- Update the launcher to escape the jvm_flags with
  WindowsEscapeArg2 instead of WindowsEscapeArg.

See https://github.com/bazelbuild/bazel/issues/7072

Closes #7421.

PiperOrigin-RevId: 233900484
2 files changed
tree: 011af67869e0e073db22655e806ec8686ac82360
  1. .bazelci/
  2. examples/
  3. scripts/
  4. site/
  5. src/
  6. third_party/
  7. tools/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. BUILD
  12. CHANGELOG.md
  13. CODEOWNERS
  14. combine_distfiles.py
  15. combine_distfiles_to_tar.sh
  16. compile.sh
  17. CONTRIBUTING.md
  18. CONTRIBUTORS
  19. distdir.bzl
  20. ISSUE_TEMPLATE.md
  21. LICENSE
  22. README.md
  23. WORKSPACE
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