msvc: Don't add dynamic link args, they're ignored

And they print a linker warning about unknown args.

mesonbuild/compilers/c.py

@@ -1275,6 +1275,9 @@ class VisualStudioCCompiler(CCompiler):
     def get_pic_args(self):
         return [] # PIC is handled by the loader on Windows
 
+    def gen_export_dynamic_link_args(self, env):
+        return [] # Not applicable with MSVC
+
     def get_std_shared_lib_link_args(self):
         return ['/DLL']