mixal-mode: add missed instructions

Synchronises with latest released GNU MDK 1.2.11

* mixal-mode.el (mixal-operation-codes-alist):
  Add missed instructions: SLB,SRB,JAE,JAO,JXE,JXO
1 job for master in 99 minutes and 57 seconds (queued for 9 seconds)
Status Job ID Name Coverage
failed #8322


Name Stage Failure
test-all Test
Makefile:313: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:288: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:966: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1