[Toybox] [PATCH] Add uuidgen.

[enh]

Reuse create_uuid, but make it match the current RFC.
---
 lib/lib.c              | 23 ++++++++---------------
 tests/uuidgen.test     |  7 +++++++
 toys/pending/uuidgen.c | 25 +++++++++++++++++++++++++
 3 files changed, 40 insertions(+), 15 deletions(-)
 create mode 100755 tests/uuidgen.test
 create mode 100644 toys/pending/uuidgen.c
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