debuginfod: Query debuginfod servers before printing response

debuginfod: Query debuginfod servers before printing response

While checking PR27277 on some buildbots, greping would fail in
run-debuginfod-response-headers.sh. This was because querying the
debuginfod server occurs after checking if the responseh headers had
arrived, leaving the possibility to leave the querying loop before
outputting the headers which caused the grep failure. Querying now
occurs before checking if response headers have arrived, so that they
will certainly be printed and grep will find them.

Signed-off-by: Noah Sanci <nsanci@redhat.com>