Bump Iris (make use of `excl_auth`).

1 job for master in 15 minutes and 12 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
failed #50852
fp
build-iris.dev

00:15:12

 
Name Stage Failure
failed
build-iris.dev Build
Makefile.coq:326: recipe for target 'all' failed
make[1]: *** [all] Error 2
Makefile:6: recipe for target 'all' failed
make: *** [all] Error 2

real 0m32.396s
user 1m7.016s
sys 0m2.788s
ERROR: Job failed: exit code 1