Assert that certain env vars are set in these build-time tools

All of those env vars are exported from config_host.mk or config_host_lang.mk.

The asserts guard potential future changes from using OString to using
std::string_view, where OString has an undocumented feature of allowing
construction from a null pointer.

Change-Id: I7bb2217fb1d38300bf169b17e9e72dafc6970b2a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107414
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

0 files changed, 0 insertions, 0 deletions