lang/php80: Upgrade from 8.0.17 to 8.0.18

Changelog:

    Core:
        Fixed freeing of internal attribute arguments.
        Fixed bug #8070 (memory leak of internal function attribute hash).
        Fixed bug #8160 (ZTS support on Alpine is broken).
    Filter:
        Fixed signedness confusion in php_filter_validate_domain().
    Intl:
        Fixed bug #8142 (Compilation error on cygwin).
    MBString:
        Fixed bug #8208 (mb_encode_mimeheader: $indent functionality broken).
    MySQLi:
        Fixed bug #8068 (mysqli_fetch_object creates inaccessible properties).
    Pcntl:
        Fixed bug #8142 (Compilation error on cygwin).
    PgSQL:
        Fixed result_type related stack corruption on LLP64 architectures.
        Fixed bug #8253 (pg_insert() fails for references).
    Sockets:
        Fixed Solaris builds.
    SPL:
        Fixed bug #8121 (SplFileObject - seek and key with csv file inconsistent).
    Standard:
        Fixed bug #8048 (Force macOS to use statfs).

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