Merge #16927: depends: Refresh ZeroMQ 4.3.1 patch

463a1d5244 Refresh ZeroMQ 4.3.1 patch (Nathan Marley)

Pull request description:

  Currently in Alpine Linux (latest, 3.10) in the depends system, one of the ZeroMQ patches won't apply cleanly because the context around the patch has changed and Alpine's `patch` implementation can't handle the diff.

  Some patch implementations can't handle fuzz / too much divergence from the original code.

  This PR just tweaks the context code around the patch so that less-sophisticated patch implementations (such as on Alpine Linux) can apply the patch without errors.

  This partially fixes #16925

ACKs for top commit:
  fanquake:
    ACK 463a1d5244 - Tested building zeromq in depends inside an [Alpine container](https://github.com/fanquake/core-review/blob/master/docker/alpine.dockerfile) as well as on macOS.

Tree-SHA512: d6e3cb60835cdd090b9b864ca9cb33961687606bc9184fbbeb7a54ec23db4057b9317b65c5c276fb8c5492cb3cfcc4a7f3369f049551f4eb0915db971f2290ce

depends/patches/zeromq/0002-disable-pthread_set_name_np.patch

@@ -12,7 +12,7 @@ diff --git a/src/thread.cpp b/src/thread.cpp
 index a1086b0c..9943f354 100644
 --- a/src/thread.cpp
 +++ b/src/thread.cpp
-@@ -307,7 +307,7 @@ void zmq::thread_t::setThreadName (const char *name_)
+@@ -308,7 +308,7 @@ void zmq::thread_t::setThreadName (const char *name_)
   */
      if (!name_)
          return;
@@ -21,9 +21,9 @@ index a1086b0c..9943f354 100644
  #if defined(ZMQ_HAVE_PTHREAD_SETNAME_1)
      int rc = pthread_setname_np (name_);
      if (rc)
-@@ -323,6 +323,8 @@ void zmq::thread_t::setThreadName (const char *name_)
+@@ -324,6 +324,8 @@ void zmq::thread_t::setThreadName (const char *name_)
  #elif defined(ZMQ_HAVE_PTHREAD_SET_NAME)
-     pthread_set_name_np (descriptor, name_);
+     pthread_set_name_np (_descriptor, name_);
  #endif
 +#endif
 +    return;