Merge branch 'ps/build-tweaks' into rs/use-strvec-pushv

The topic moves the coccinelle rules from contrib/ to tools/ directory, breaking merges with this topic. * ps/build-tweaks: meson: precompile "git-compat-util.h" meson: compile compatibility sources separately git-compat-util.h: move warning infra to prepare for PCHs builds: move build scripts into "tools/" contrib: move "update-unicode.sh" script into "tools/" contrib: move "coverage-diff.sh" script into "tools/" contrib: move "coccinelle/" directory into "tools/" Introduce new "tools/" directory