patch 8.0.0532: test with long directory name fails on Mac

Problem:    Test with long directory name fails on Mac.
Solution:   Skip the test on Mac systems.
diff --git a/src/version.c b/src/version.c
index 56ff4f6..76929e7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    532,
+/**/
     531,
 /**/
     530,