configure: expose PYTHON to test/tcg/config-host.mak This will be useful for making $shell calls to something more flexible than the shell builtins. Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-ID: <20250725154517.3523095-11-alex.bennee@linaro.org>