third_party/protobuf: Update to HEAD (83d681ee2c)

third_party/protobuf/ruby/travis-test.sh

Index: third_party/protobuf/ruby/travis-test.sh
diff --git a/third_party/protobuf/ruby/travis-test.sh b/third_party/protobuf/ruby/travis-test.sh
index 75db7d931f7f4627f4f6890c356cda4ee7a0f80b..930165e61bdfc73373e463cd578d5ca22358fab5 100755
--- a/third_party/protobuf/ruby/travis-test.sh
+++ b/third_party/protobuf/ruby/travis-test.sh
@@ -5,17 +5,19 @@ set -e
 
 test_version() {
   version=$1
-  if [ "$version" == "jruby" ] ; then
+  if [ "$version" == "jruby-1.7" ] ; then
     # No conformance tests yet -- JRuby is too broken to run them.
     bash --login -c \
-      "rvm install $version && rvm use $version && \
+      "rvm install $version && rvm use $version && rvm get head && \
        which ruby && \
+       git clean -f && \
        gem install bundler && bundle && \
        rake test"
   else
     bash --login -c \
       "rvm install $version && rvm use $version && \
        which ruby && \
+       git clean -f && \
        gem install bundler && bundle && \
        rake test &&
        cd ../conformance && make test_ruby"