patch 9.0.0833: Mac: no +sound feature in huge build

Problem:    Mac: no +sound feature in huge build.
Solution:   Enable +sound in Mac huge build. (closes #11497)
diff --git a/src/vim.h b/src/vim.h
index 3ef6469..be0a640 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -167,7 +167,7 @@
 # if defined(FEAT_NORMAL) && !defined(FEAT_CLIPBOARD)
 #  define FEAT_CLIPBOARD
 # endif
-# if defined(FEAT_BIG) && !defined(FEAT_SOUND)
+# if defined(FEAT_HUGE) && !defined(FEAT_SOUND)
 #  define FEAT_SOUND
 # endif
 # if defined(FEAT_SOUND)