Add utility to sort universal tags in preferred order.

This could be helpful in combination with find(1) to re-sort any universal tag
files when manual additions were made. The automatic recalibration (which uses
tagadjust) already sorts the output so does not need this.

Gbp-Dch: ignore

Signed-off-by: Chris Lamb <lamby@debian.org>
4 jobs for master in 83 minutes and 35 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Test
passed #181352
stable-bpo

01:23:34

failed #181351
testing

00:41:26

failed #181350
unstable

00:42:51

 
  External
passed jenkins

00:16:21

 
Name Stage Failure
failed
unstable Test
  Failed tests:  80, 84
Non-zero exit status: 1
Files=74, Tests=35006, 192 wallclock secs ( 3.34 usr 0.62 sys + 172.81 cusr 11.55 csys = 188.32 CPU)
Result: FAIL

real 3m13.065s
user 2m56.978s
sys 0m12.310s
ERROR: Job failed: exit code 1
failed
testing Test
  Failed tests:  80, 84
Non-zero exit status: 1
Files=74, Tests=35006, 182 wallclock secs ( 3.57 usr 0.45 sys + 164.26 cusr 10.58 csys = 178.86 CPU)
Result: FAIL

real 3m3.299s
user 2m48.648s
sys 0m11.141s
ERROR: Job failed: exit code 1