Configurations/10-main.conf: add magic macros to hpux targets.

HP-UX provides sockets symbols with incompatible prototypes under same
names. Additional macros force unambitious symbols with unambitious
prototypes.

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/5862)