[libc] make the scudo integration test run

adds a custom command for libc-scudo-integration-test that makes it run
when it is built.

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D108409

GitOrigin-RevId: 6ce6fa4ad430b6045e07bc6191da7bcae2697f17
1 file changed