Rename Gemfile for blog6 test

* Otherwise GitHub thinks those gems are dependencies of TruffleRuby.
* It's no longer sufficient to rename the Gemfile.lock.

Author: eregon

test/truffle/ecosystem/blog-shared.sh.inc

@@ -8,7 +8,8 @@ alias truffleruby="jt ruby -S"
 
 gem_test_pack_path="$1"
 
-# The Gemfile.lock is renamed to avoid GitHub thinking those gems are dependencies of TruffleRuby
+# The Gemfile and Gemfile.lock are renamed to avoid GitHub thinking those gems are dependencies of TruffleRuby
+cp Gemfile.renamed Gemfile
 cp Gemfile.lock.renamed Gemfile.lock
 
 if [ "$gem_test_pack_path" ]; then