Replace scrubbing with copybara-comment-this-out-please in copybara
This will make sure the copybara export is reversible, which is needed for setting up copybara workflow for importing github PRs.
RELNOTES: None.
syntax = "proto2";
-// option java_api_version = 2;
+// option java_api_version = 2; // copybara-comment-this-out-please
option java_package = "com.google.devtools.build.lib.view.config.crosstool";
package com.google.devtools.build.lib.view.config.crosstool;
