patch 8.0.0197: system() test skips some parts for MS-Windows

Problem:    On MS-Windows the system() test skips a few parts.
Solution:   Swap single and double quotes for the command.
diff --git a/src/version.c b/src/version.c
index b0f1c22..71c0450 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    197,
+/**/
     196,
 /**/
     195,