master from https://github.com/j6t/gitk
Merge branch 'pks-meson-support' of https://github.com/pks-t/gitk
* 'pks-meson-support' of https://github.com/pks-t/gitk:
gitk: introduce support for the Meson build system
gitk: extract script to build executable
Signed-off-by: Johannes Sixt <j6t@kdbg.org>