pgAdmin 4 commit: Make the error messages on exit show something useful

Make the error messages on exit show something useful.

Branch
------
master

Details
-------
https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=649ca2eeac12ae8f8ca2ccca337c5151132ff915

Modified Files
--------------
pkg/debian/build.sh | 3 +--
pkg/mac/build.sh    | 3 +--
pkg/redhat/build.sh | 3 +--
3 files changed, 3 insertions(+), 6 deletions(-)