Stop listing every file during unix distributables test

Not a big problem, but makes the logs awkward to dig into and it's
entirely unhelpful & unnecessary.

Author: pimterry

test/distributables-test/unix.sh

@@ -4,7 +4,7 @@ set -e
 
 ls -la *
 
-tar -xvzf ./distributables/v*/httptoolkit-server-*-$1-x64.tar.gz
+tar -xzf ./distributables/v*/httptoolkit-server-*-$1-x64.tar.gz
 
 echo "\nStarting server..."