patch 9.0.2101: CI: test_termdebug may still fail

Problem:  CI: test_termdebug may still fail
Solution: use term_wait() to make it more robust

closes: #13529

Signed-off-by: shane.xb.qian <shane.qian@foxmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_termdebug.vim b/src/testdir/test_termdebug.vim
index 16de057..5f547c9 100644
--- a/src/testdir/test_termdebug.vim
+++ b/src/testdir/test_termdebug.vim
@@ -96,6 +96,7 @@
     bw!
   endif
   set columns=160
+  call term_wait(gdb_buf)
   let winw = winwidth(0)
   Var
   if winwidth(0) < winw
@@ -113,6 +114,7 @@
     bw!
   endif
   set columns&
+  call term_wait(gdb_buf)
 
   wincmd t
   quit!
diff --git a/src/version.c b/src/version.c
index 02d3472..1282154 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2101,
+/**/
     2100,
 /**/
     2099,