transform_mjit_header.rb: `inline` may be a macro

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65170 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

tool/transform_mjit_header.rb

@@ -27,6 +27,7 @@ module MJITHeader
   # These macros are relied on this script's transformation
   PREFIXED_MACROS = [
     'ALWAYS_INLINE',
+    'inline',
   ]
 
   # For MinGW's ras.h. Those macros have its name in its definition and can't be preprocessed multiple times.