third_party/protobuf: Update to HEAD (83d681ee2c)

third_party/protobuf/.gitignore

Index: third_party/protobuf/.gitignore
diff --git a/third_party/protobuf/.gitignore b/third_party/protobuf/.gitignore
index 27eeb9c224afdd9bf8f2e39a9b3fefffa9c1418f..4383c623e5d3cfb96eb5ba5cce726327213ec4e0 100644
--- a/third_party/protobuf/.gitignore
+++ b/third_party/protobuf/.gitignore
@@ -64,6 +64,8 @@ src/protoc
 src/unittest_proto_middleman
 
 # Generated test scaffolding
+src/no_warning_test.cc
+src/no-warning-test
 src/protobuf*-test
 src/test_plugin
 src/testzip.*
@@ -77,7 +79,8 @@ src/**/*.log
 src/**/*.trs
 
 # JavaBuild output.
-java/target
+java/core/target
+java/util/target
 javanano/target
 
 # Windows native output.
@@ -88,16 +91,14 @@ build_msvc
 # packages themselves.
 /csharp/src/packages/*/
 
-# Directories created by opening the Objective C Xcode projects.
-objectivec/ProtocolBuffers_OSX.xcodeproj/project.xcworkspace/xcuserdata/
-objectivec/ProtocolBuffers_OSX.xcodeproj/project.xcworkspace/xcshareddata/ProtocolBuffers_OSX.xccheckout
-objectivec/ProtocolBuffers_OSX.xcodeproj/xcuserdata/
-objectivec/ProtocolBuffers_iOS.xcodeproj/project.xcworkspace/xcuserdata/
-objectivec/ProtocolBuffers_iOS.xcodeproj/project.xcworkspace/xcshareddata/ProtocolBuffers_iOS.xccheckout
-objectivec/ProtocolBuffers_iOS.xcodeproj/xcuserdata/
 # OS X's Finder creates these for state about opened windows/etc.
 **/.DS_Store
 
+# Cocoapods artifacts
+# Podfile.lock and the workspace file are tracked, to ease deleting them. That's
+# needed to trigger "pod install" to rerun the preinstall commands.
+Pods/
+
 # Comformance test output
 conformance/.libs/
 conformance/com/
@@ -110,8 +111,35 @@ conformance/conformance.pb.cc
 conformance/conformance.pb.h
 conformance/Conformance.pbobjc.h
 conformance/Conformance.pbobjc.m
-conformance/conformance.rb
+conformance/conformance_pb.rb
+conformance/failing_tests.txt
 conformance/google/
 conformance/javac_middleman
 conformance/lite/
+conformance/nonexistent_tests.txt
 conformance/protoc_middleman
+conformance/succeeding_tests.txt
+
+# php test output
+composer.lock
+php/tests/generated/
+php/ext/google/protobuf/.libs/
+php/ext/google/protobuf/Makefile.fragments
+php/ext/google/protobuf/Makefile.global
+php/ext/google/protobuf/Makefile.objects
+php/ext/google/protobuf/acinclude.m4
+php/ext/google/protobuf/build/
+php/ext/google/protobuf/config.h
+php/ext/google/protobuf/config.nice
+php/ext/google/protobuf/configure.in
+php/ext/google/protobuf/mkinstalldirs
+php/ext/google/protobuf/run-tests.php
+vendor/
+
+# JavaScript artifacts
+js/commonjs_out/
+js/deps.js
+js/google-protobuf.js
+js/google/
+js/node_modules/
+js/testproto_libs.js