Run some open-source projects through an aggressive debug
configuration with asan and ubsan. We don't care about test results,
only check that we don't assert or crash.
Currently testing laravel, symfony and amp.
This adds the Autoconf's --enable-option-checking=fatal option so
when non existing option from the PHP's configure options is used
a fatal error happens.
Also adds an --asan flag to run-tests.php to setup all the necessary
environment variables. Some tests are marked as skipped because they
are incompatible with asan or too slow.
I'm basing this on the DEBUG_ZTS build, which seems to give us the
most mileage.
