patch 9.0.1739: Leftover files in libvterm

Problem: leftover files in libvterm
Solution: Fix cleaning of libvterm directory

Delete the libvterm/src/.libs directory and fix typo in libvterm/t/.libs
directory name.

closes: #12846

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: James McCoy <jamessan@jamessan.com>
diff --git a/src/version.c b/src/version.c
index f6022d2..52d128a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1739,
+/**/
     1738,
 /**/
     1737,