Improve detection of pdumper file and *.eln files

* src/emacs.c (load_pdump_find_executable): Resolve symlinks even
if argv[0] includes leading directories.  (Bug#46790)
10 jobs for feature/native-comp in 1 minute and 9 seconds (queued for 5 seconds)
latest
Status Job ID Name Coverage
  Prep Images
failed #23534
prep-image-base

00:01:09

 
  Build Images
skipped #23535
build-image-inotify
 
  Platform Images
skipped #23536
build-image-filenotify-gio
skipped #23537
build-image-gnustep
 
  Platforms
skipped #23538
test-filenotify-gio
skipped #23539
test-gnustep
 
  Slow
skipped #23543
test-all-inotify
skipped #23540
test-native-bootstrap-speed0
skipped #23541
test-native-bootstrap-speed1
skipped #23542
test-native-bootstrap-speed2
 
Name Stage Failure
failed
prep-image-base Prep Images There has been a runner system failure, please try again
Initialized empty Git repository in /builds/emacs/emacs/.git/
Created fresh repository.
From https://emba.gnu.org/emacs/emacs
* [new ref] fa65c044f2ebe666467166075c1507a8d0e1347f -> refs/pipelines/11453
* [new branch] feature/native-comp -> origin/feature/native-comp
Checking out fa65c044 as feature/native-comp...

Skipping Git submodules setup
ERROR: Job failed (system failure): Error response from daemon: Conflict. The container name "/runner-2oEDrUT7-project-1-concurrent-1-build-4" is already in use by container "f46df44a43bee1f61a6ede2eac732a4e06eaa2094659f7ea23718f093d67bcc6". You have to remove (or rename) that container to be able to reuse that name. (executor_docker.go:726:0s)