lang/php80: Upgrade from RC3 to RC5

Changelogs:

19 Nov 2020, PHP 8.0.0RC5

• Core: . Fixed bug #74558 (Can't rebind closure returned by Closure::fromCallable()). (cmb)

• Reflection: . Fixed bug #80370 (getAttributes segfault on dynamic properties). (Benjamin Eberlei)

12 Nov 2020, PHP 8.0.0RC4

• Core: . Fixed bug #80334 (assert() vs named parameters - confusing error). (Nikita)

• FFI: . Fixed bug #79177 (FFI doesn't handle well PHP exceptions within callback). (cmb, Dmitry, Nikita)

• ODBC: . Fixed bug #44618 (Fetching may rely on uninitialized data). (cmb)

• Opcache: . Fixed run-time binding of preloaded dynamically declared function. (Dmitry)

• Reflection: . Fixed bug #80299 (ReflectionFunction->invokeArgs confused in arguments). (Nikita)

• SNMP: . Fixed bug #70461 (disable md5 code when it is not supported in net-snmp). (Alexander Bergmann, cmb)

• Standard: . Don't force rebuild of symbol table, when populating $http_response_header variable by the HTTP stream wrapper. (Dmitry) . Fixed bug #80290 (Double free when ASSERT_CALLBACK is used with a dynamic message). (Nikita) . Fixed bug #80266 (parse_url silently drops port number 0). (cmb, Nikita)

• Tokenizer: . Fixed bug #80328 (PhpToken::getAll() confusing name). (Nikita)

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