patch 8.2.1194: test failure because shell prompt differs

Problem:    Test failure because shell prompt differs.
Solution:   Set the shell prompt.

src/testdir/dumps/Test_popupwin_term_01.dump

@@ -1,4 +1,4 @@
-|$+0&#ffffff0| @73
+|v+0&#ffffff0|i|m|>| @70
 @75
 @34|╔+0#0000001#ffd7ff255|═@3|╗| +0#0000000#ffffff0@34
 @34|║+0#0000001#ffd7ff255|1@3|║| +0#0000000#ffffff0@34

src/testdir/dumps/Test_popupwin_term_02.dump

@@ -1,4 +1,4 @@
-|$+0&#ffffff0| @73
+|v+0&#ffffff0|i|m|>| @70
 @75
 @14|╔+0#0000001#ffd7ff255|═@3|╗| +0#0000000#ffffff0@54
 @14|║+0#0000001#ffd7ff255|1@3|║| +0#0000000#ffffff0@54

src/testdir/test_popupwin.vim

@@ -585,6 +585,7 @@ func Test_popup_drag_termwin()
   " create a popup that covers the terminal window
   let lines =<< trim END
 	set shell=/bin/sh noruler
+	let $PS1 = 'vim> '
         terminal
 	$wincmd w
 	let winid = popup_create(['1111', '2222'], #{

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1194,
 /**/
     1193,
 /**/