dap-cpptools-setup set file mode on mac mono (#496)

It currently checks if mono-mac exists, then attempts to set file modes on the linux mono

Author: darin-costello

dap-cpptools.el

@@ -71,7 +71,7 @@ With prefix, FORCED to redownload the extension."
       (when (f-exists? mono)
         (set-file-modes mono #o0700))
       (when (f-exists? mono-mac)
-        (set-file-modes mono #o0700))
+        (set-file-modes mono-mac #o0700))
       (when (f-exists? lldb-mi)
         (set-file-modes lldb-mi #o0700)))