patch 9.1.0657: MS-Windows: MSVC build time can be optimized

Problem:  MS-Windows: MSVC build time can be optimized
Solution: Stop using Powershell, show detected version, read _MSC_VER
          and _MSC_FULL_VER in a single cl execution. (Ken Takata)

closes: #15421

Signed-off-by: Ken Takata <kentkt@csc.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 4a985b9..c36aa51 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    657,
+/**/
     656,
 /**/
     655,