Use clang tools in openjdk11 build Prepend the clang bin direcotry to the PATH so that configure finds tools like dsymutil from the hermetic clang instead of /usr/bin. Fixes an incompatibility between the updated clang and the host dsymutil. Bug: 182620358 Test: builds Change-Id: If2a4cd4749c7745c9f05f799311e3899c9ec9122