meson: fix 13146

This is probably a temporary fix until 13149 is tackled. And we need to make sure it works on all platforms.
The problem has been patched on macOS so we could also skip this change until the proper fix is done.

modules/meson.build

@@ -86,7 +86,7 @@ foreach module : modules
   link = module.get('link', [])
   link_args = module.get('link-args', [])
 
-  library(name,
+  shared_module(name,
     srcs,
     include_directories: rootInclude,
     dependencies: modules_deps + [ deps ],
@@ -94,5 +94,7 @@ foreach module : modules
     link_args: link_args,
     install: true,
     install_dir: gimpplugindir / 'modules',
+    # Explicitly set .so suffix on macOS
+    name_suffix: host_machine.system() == 'darwin' ? 'so' : [],
   )
 endforeach