The analyze-qemu-coverage.sh script cracks open the _disk_image for the
given SERENITY_ARCH and SERENITY_TOOLCHAIN and extracts llvm profile
data into a local directory owned by the current user. It then calls a
coverage artifact script from llvm to create a nice html report for all
the source files referenced by the profile data files.
We currently grab a script from llvm via wget. In the future a custom
script to call llvm-cov and llvm-profdata should probably be used.
