$? in perl gets the status value from wait(2), which is a word with
the exit code in the upper half and the number of a raised signal in
the lower half. OpenSSL::Test::run() ignored the signal half up until
now.
With this change, we recalculate an exit code the same way the Unix
shells do, using this formula:
($? & 0x7f) ? ($? & 0x7f)|0x80 : ($? >> 8);
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
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