nicer formatting for MAC info

The info printing for PBES2 already uses space after type and commas to
separate items in the line so use the same format for MAC info too.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1334)