The external BoringSSL tests had some failures as a result of
the extensions refactor. This was due to a deliberate relaxation
of the duplicate extensions checking code. We now only check
known extensions for duplicates. Unknown extensions are ignored.
This is allowed behaviour, so we suppress those BoringSSL tests.

Perl changes reviewed by Richard Levitte. Non-perl changes reviewed by Rich
Salz
Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Reviewed-by: NRichard Levitte <levitte@openssl.org>

The updated shim has the ability to skip tests using unimplemented flags.
This should reduce the number of test failures.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

We will rely on the -allow-unimplemented feature instead.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

This just disables all tests that fail at the moment. Over time we will
want to go over these and figure out why they are failing (and fix them if
appropriate)
Reviewed-by: NRichard Levitte <levitte@openssl.org>