Add explanation for clisp dump-image.

Put in an explanation of the oddball `executable` argument to
clisp (thanks to Faré).
9 jobs for !155 with clisp-image-fix in 39 minutes and 55 seconds (queued for 12 seconds)
latest detached
Status Name Job ID Coverage
  Build
passed Build ASDF #13816

00:01:53

passed Build docs #13817

00:05:22

 
  Regression
passed ABCL 1.7.1 regression tests #13819

00:37:58

failed ABCL regression tests #13818
allowed to fail

00:34:34

passed CCL regression tests #13820

00:06:51

passed CLISP regression tests #13821

00:05:46

passed CMUCL regression tests #13822

00:06:59

passed ECL regression tests #13823

00:07:38

passed SBCL regression tests #13824

00:05:30

 
Name Stage Failure
failed
ABCL regression tests Regression
No job log