patch 8.0.0757: libvterm MSVC Makefile not included in the distribution

Problem:    Libvterm MSVC Makefile not included in the distribution.
Solution:   Add the file to the list.
diff --git a/src/version.c b/src/version.c
index 4652529..ad2a45d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    757,
+/**/
     756,
 /**/
     755,