Don't include C define flags in assembler arguments.

Author: jdm

etc/patches/no_asm_defines.patch

@@ -0,0 +1,11 @@
+--- a/mozjs/python/mozbuild/mozbuild/frontend/emitter.py
++++ b/mozjs/python/mozbuild/mozbuild/frontend/emitter.py
+@@ -1136,7 +1136,7 @@ class TreeMetadataEmitter(LoggingMixin):
+             generated_files.add(str(sub.relpath))
+             yield sub
+ 
+-        for defines_var, cls, backend_flags in (('DEFINES', Defines, (computed_flags, computed_as_flags)),
++        for defines_var, cls, backend_flags in (('DEFINES', Defines, (computed_flags,)),
+                                                 ('HOST_DEFINES', HostDefines, (computed_host_flags,))):
+             defines = context.get(defines_var)
+             if defines:

mozjs/python/mozbuild/mozbuild/frontend/emitter.py

@@ -1136,7 +1136,7 @@ def emit_from_context(self, context):
             generated_files.add(str(sub.relpath))
             yield sub
 
-        for defines_var, cls, backend_flags in (('DEFINES', Defines, (computed_flags, computed_as_flags)),
+        for defines_var, cls, backend_flags in (('DEFINES', Defines, (computed_flags,)),
                                                 ('HOST_DEFINES', HostDefines, (computed_host_flags,))):
             defines = context.get(defines_var)
             if defines: