ADD: added new version of protobuf

libs/protobuf/kokoro/macos/cpp/build.sh

@@ -2,16 +2,10 @@
 #
 # Build file to set up and run tests
 
-set -eux
-set -o pipefail
-
-# Run from the project root directory.
+# Change to repo root
 cd $(dirname $0)/../../..
 
 # Prepare worker environment to run tests
 source kokoro/macos/prepare_build_macos_rc
 
-#
-# Run build
-#
-bazel test $(kokoro/common/bazel_flags.sh) //src/...
+./tests.sh cpp