CDRIVER-2104 Ensure llvm-cov can be found
CDRIVER-2104 Ensure llvm-cov can be found

ajdavis/libbson,mongodb/libbson,ajdavis/libbson,ajdavis/libbson,rcsanchez97/libbson,mapr/libbson,rcsanchez97/libbson,bjori/libbson,mongodb/libbson,bjori/libbson,bjori/libbson,mapr/libbson,rcsanchez97/libbson,mapr/libbson,mongodb/libbson