[contrib.glfw3] added support for pthread (#23245)

Following some user request, I made the necessary changes to the code as
well as the port file to add pthread support. I followed the pattern in
other ports (like sdl2) for adding the `-pthread` option when
`settings.PTHREAD` is defined and used the same extension for the
library name (`-mt`).

tools/ports/contrib/glfw3.py

@@ -6,8 +6,8 @@
 import os
 from typing import Union, Dict
 
-TAG = '3.4.0.20241004'
-HASH = 'd2745e9f621090b6f78e1c8122d1e6a2e7e774d27799f14945ddcfd543aedeac0e6acdecf42fe74f9ecdbc25aa3599372798ecfc55ddd941661e0628c494cda6'
+TAG = '3.4.0.20241221'
+HASH = 'e977fcab4747085fead33ab365ece02d6185564401f4904583095e45d3599d2be9315398f8b414b0da8ee954964a1649d2932d378fc8bf96caa986b43b3ae5e7'
 
 # contrib port information (required)
 URL = 'https://github.com/pongasoft/emscripten-glfw'
@@ -44,6 +44,7 @@ def get_lib_name(settings):
           ('-nw' if opts['disableWarning'] else '') +
           ('-nj' if opts['disableJoystick'] else '') +
           ('-sw' if opts['disableMultiWindow'] else '') +
+          ('-mt' if settings.PTHREADS else '') +
           '.a')
 
 
@@ -71,6 +72,9 @@ def create(final):
     if opts['disableMultiWindow']:
       flags += ['-DEMSCRIPTEN_GLFW3_DISABLE_MULTI_WINDOW_SUPPORT']
 
+    if settings.PTHREADS:
+      flags += ['-pthread']
+
     ports.build_port(source_path, final, port_name, includes=source_include_paths, flags=flags)
 
   return [shared.cache.get_lib(get_lib_name(settings), create, what='port')]