trivial: Disable clang scan-build
trivial: Disable clang scan-build

It is causing CI to fail, and signal-to-noise ratio is now basically zero.

hughsie/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd