Notes for scheme48 - reproducible builds result

Version annotated: 1.9-5
Comments: Captures building username and build date in 'scheme48.image' (a file which has differences). Generated by build/build-usual-image.
That file also sees the build path but it is unclear whether that affects the output (diffoscope output was truncated).

Our notes about issues affecting packages are stored in notes.git and are targeted at packages in Debian in 'unstable/amd64' (unless they say otherwise).