Notes for whitakers-words - reproducible builds result

Version annotated: 0.2020.10.27-1.1
Identified issues:
Identifier: cflags_recorded_in_ada_ali_files
Description For example
-A -fdebug-prefix-map=/home/lamby/temp/cdt.20181107083218.xPYfSWqN3H.repro.libgnatcoll-bindings/build-a/libgnatcoll-bindings-18=.
+A -fdebug-prefix-map=/home/lamby/temp/cdt.20181107083218.xPYfSWqN3H.repro.libgnatcoll-bindings/build-b/libgnatcoll-bindings-18=.
Fixed in gcc >= 8.2.0-13, broken in >= 9, hopefully fixed in >= 9.2.1-18.
Also can vary due to things like `gnatem=/tmp/GNAT-TEMP-000010.TMP` in
cflags, which appears to be (for example)

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).