Update third_party/protobuf to protobuf-v3.0.0-beta-3

third_party/protobuf/objectivec/generate_descriptors_proto.sh

-#!/bin/bash
-
-# Run this script to regenerate descriptor.pbobjc.{h,m} after the protocol
-# compiler changes.
-
-# HINT:  Flags passed to generate_descriptor_proto.sh will be passed directly
-#   to make when building protoc.  This is particularly useful for passing
-#   -j4 to run 4 jobs simultaneously.
-
-set -eu
-
-readonly ScriptDir=$(dirname "$(echo $0 | sed -e "s,^\([^/]\),$(pwd)/\1,")")
-readonly ProtoRootDir="${ScriptDir}/.."
-
-pushd "${ProtoRootDir}" > /dev/null
-
-if test ! -e src/google/protobuf/stubs/common.h; then
-  cat >&2 << __EOF__
-Could not find source code.  Make sure you are running this script from the
-root of the distribution tree.
-__EOF__
-  exit 1
-fi
-
-if test ! -e src/Makefile; then
-  cat >&2 << __EOF__
-Could not find src/Makefile.  You must run ./configure (and perhaps
-./autogen.sh) first.
-__EOF__
-  exit 1
-fi
-
-# Make sure the compiler is current.
-cd src
-make $@ protoc
-
-declare -a RUNTIME_PROTO_FILES=( \
-  google/protobuf/any.proto \
-  google/protobuf/api.proto \
-  google/protobuf/descriptor.proto \
-  google/protobuf/duration.proto \
-  google/protobuf/empty.proto \
-  google/protobuf/field_mask.proto \
-  google/protobuf/source_context.proto \
-  google/protobuf/struct.proto \
-  google/protobuf/timestamp.proto \
-  google/protobuf/type.proto \
-  google/protobuf/wrappers.proto)
-
-./protoc --objc_out="${ProtoRootDir}/objectivec" ${RUNTIME_PROTO_FILES[@]}