GNUInstallDirs: `CMAKE_INSTALL_LIBEXECDIR` should be `libexec` on Debian when installing to `/usr`.
Issue #21287 (closed) mistakenly states that Debian Policy does not permit installing internal binaries to libexec
.
The Debian Policy builds upon FHS 3.0 and permits installing to /usr/libexec
. While Policy does grant an additional exception for applications to use a single subdirectory of /usr/lib/<triplet>
, this is not meant to replace /usr/libexec
as valid target.