Fix msgpack test and do not install Bundler docs

Author: eregon

test/truffle/cexts/msgpack/msgpack.sh

@@ -7,10 +7,12 @@ jt gem-test-pack
 ruby_home="$PWD"
 export PATH="$ruby_home/bin:$PATH"
 
-gem install "$(jt gem-test-pack)/gem-cache/bundler-1.16.5.gem" --local
+gem install "$(jt gem-test-pack)/gem-cache/bundler-1.16.5.gem" --local --no-document
 
 cd "$(jt gem-test-pack)/gem-testing/msgpack-ruby"
 
+bundle config --local cache_path ./gem-cache
+
 bundle install --local --no-cache
 bundle exec rake compile
 bundle exec rake spec

test/truffle/ecosystem/blog.sh

@@ -28,7 +28,7 @@ function truffleruby {
 set -xe
 
 jt gem-test-pack
-truffleruby gem install truffleruby-gem-test-pack/gem-cache/bundler-1.16.5.gem --local
+truffleruby gem install truffleruby-gem-test-pack/gem-cache/bundler-1.16.5.gem --local --no-document
 
 # backup bin/rake, which gets overwritten
 cp bin/rake bin/rake-original

tool/jt.rb

@@ -25,7 +25,7 @@
 MRI_TEST_CEXT_LIB_DIR = "#{TRUFFLERUBY_DIR}/.ext/c"
 PROFILES_DIR = "#{TRUFFLERUBY_DIR}/profiles"
 
-TRUFFLERUBY_GEM_TEST_PACK_VERSION = "af03b9fbb684624095de928f2b6238db26544052"
+TRUFFLERUBY_GEM_TEST_PACK_VERSION = "8b57f6022f0fa17ace7c8d2a3af730357715e0a2"
 
 JDEBUG_PORT = 51819
 JDEBUG = "-J-agentlib:jdwp=transport=dt_socket,server=y,address=#{JDEBUG_PORT},suspend=y"