Ignore gprconfig errors

If gprconfig does not work on old distros (stretch), it's not important, it is only needed on buster configurations when llvm conflicts with gcc
r
1 job for feature_gprconfig in 7 minutes and 42 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed #1209
build

00:07:42

 
Name Stage Failure
failed
build Build
make[1]: *** [all] Error 1
Makefile:52: recipe for target 'test' failed
make: *** [test] Error 2
Running after_script
Uploading artifacts for failed job
Uploading artifacts...
test/logs/*.err.txt: found 55 matching files

Uploading artifacts to coordinator... ok
id=1209 responseStatus=201 Created token=AQ2Fp69C
ERROR: Job failed: exit code 1