nasm: Add -mms-bitfields to the list of ignored flags

Fixes building Nasm objects with Meson's native language support, when
depending against a library that exports that flag, like Glib.

(cherry picked from commit 07777c7)

mesonbuild/compilers/asm.py

@@ -73,7 +73,7 @@ def get_output_args(self, outputname: str) -> T.List[str]:
     def unix_args_to_native(self, args: T.List[str]) -> T.List[str]:
         outargs: T.List[str] = []
         for arg in args:
-            if arg == '-pthread':
+            if arg in {'-mms-bitfields', '-pthread'}:
                 continue
             outargs.append(arg)
         return outargs