patch 8.0.0154: system() test fails on OS/X

Problem:    system() test fails on OS/X.
Solution:   Deal with leading spaces.
diff --git a/src/version.c b/src/version.c
index a1a7469..368e6be 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    154,
+/**/
     153,
 /**/
     152,