Improve `comp-libgccjit-reproducer'

	* src/comp.c (Fcomp__compile_ctxt_to_file): Better libgccjit
	reproducer file name.
	* lisp/emacs-lisp/comp.el (comp-libgccjit-reproducer): Doc update.
	(comp-final, comp-run-async-workers): Pass
	`comp-libgccjit-reproducer' setting to child workers.
5 jobs for feature/native-comp in 193 minutes and 46 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #9874
test-filenotify-gio

01:30:47

passed #9878
test-gnustep

01:42:47

passed #9875
test-native-bootstrap-speed0

03:13:45

passed #9876
test-native-bootstrap-speed1

02:31:20

passed #9877
test-native-bootstrap-speed2

01:24:59