Due to my (Andres') omission auto_explain did not include information
about JIT compilation. Fix that.

Author: Lukas Fittl
Discussion:
https://postgr.es/m/CAP53PkzgSyoTCau0-5FNaM484B=uO8nLzma7L1ncWLb1=oVJQA@mail.gmail.com
Backpatch: 11-, where JIT compilation was introduced