Log Message:
lang/php73: update to 7.3.12

Update php73 package to 7.3.12.

21 Nov 2019, PHP 7.3.12

- Core:
  . Fixed bug #78658 (Memory corruption using Closure::bindTo). (Nikita)
  . Fixed bug #78656 (Parse errors classified as highest log-level). (Erik
    Lundin)
  . Fixed bug #78752 (Segfault if GC triggered while generator stack frame is
    being destroyed). (Nikita)
  . Fixed bug #78689 (Closure::fromCallable() doesn't handle
    [Closure, '__invoke']). (Nikita)

- COM:
  . Fixed bug #78694 (Appending to a variant array causes segfault). (cmb)

- Date:
  . Fixed bug #70153 (\DateInterval incorrectly unserialized). (Maksim Iakunin)
  . Fixed bug #78751 (Serialising DatePeriod converts DateTimeImmutable). (cmb)

- Iconv:
  . Fixed bug #78642 (Wrong libiconv version displayed). (gedas at martynas,
    cmb).

- OpCache:
  . Fixed bug #78654 (Incorrectly computed opcache checksum on files with
    non-ascii characters). (mhagstrand)
  . Fixed bug #78747 (OpCache corrupts custom extension result). (Nikita)

- OpenSSL:
  . Fixed bug #78775 (TLS issues from HTTP request affecting other encrypted
    connections). (Nikita)

- Reflection:
  . Fixed bug #78697 (ReflectionClass::ImplementsInterface - inaccurate error
    message with traits). (villfa)

- Sockets:
  . Fixed bug #78665 (Multicasting may leak memory). (cmb)