python: specify python3 interpreter

* dev/nolimips.py,
* doc/inst-set.texi.gen.py,
* src/inst/nodes.gen.py,
* src/inst/nodes.mk.gen.py,
* src/inst/program_builder.hh.gen.py,
* src/inst/program_solver.gen.py,
* src/parse/asm-parse.yy.gen.py,
* src/parse/asm-scan.ll.gen.py: Here.
2 jobs for rdm/update-dependencies in 5 minutes and 23 seconds
Status Job ID Name Coverage
  Test
failed #103878
debian-stable-gcc

00:05:23

canceled #103877
debian-stable-gcc

00:01:07

 
Name Stage Failure
failed
debian-stable-gcc Test
make[2]: Leaving directory '/builds/tiger/nolimips/distrib'
make[2]: Entering directory '/builds/tiger/nolimips'
make[2]: Leaving directory '/builds/tiger/nolimips'
make[1]: *** [Makefile:461: all-recursive] Error 1
make[1]: Leaving directory '/builds/tiger/nolimips'
make: *** [Makefile:391: all] Error 2
Running after_script
Uploading artifacts for failed job
ERROR: Job failed: exit code 1