make-snapshot: remove $GZIP
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55947 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
make-snapshot: remove $GZIP
to its command line arguments.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55947 b2dd03c8-39d4-4d8f-98ff-823fe69b080e