* configure.ac (run_tests, RUN_TESTS, RUN_GPG_TESTS): Remove
variables. They are misleadingly named, as they inhibit building the
tests. There is no reason not to build the tests even when
cross-compiling, as they are only run if one does 'make check'.
* Makefile: Adapt accordingly.
* tests/Makefile.am: Adapt accordingly. Avoid building 'asschk' on
Windows as it uses non-portable functions.
Signed-off-by: Justus Winter <justus@g10code.com>