patch 9.1.1484: tests: Turkish locale tests fails on Mac

Problem:  tests: Turkish locale tests fails on Mac
          (after v9.1.1480)
Solution: skip the test Test_pos_percentage_in_turkish_locale() on Mac

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_normal.vim b/src/testdir/test_normal.vim
index 1ce6314..a0ee3b8 100644
--- a/src/testdir/test_normal.vim
+++ b/src/testdir/test_normal.vim
@@ -4379,6 +4379,7 @@
 
 func Test_pos_percentage_in_turkish_locale()
   CheckRunVimInTerminal
+  CheckNotMac
   defer execute(':lang C')
 
   try