patch 8.1.0430: Xargadd file left behind after running test

Problem:    Xargadd file left behind after running test.
Solution:   Delete the file. (Dominique Pelle)

src/testdir/test_arglist.vim

@@ -94,6 +94,7 @@ func Test_argadd_empty_curbuf()
   call assert_equal('Xargadd', bufname('%'))
   call assert_equal(2, line('$'))
 
+  call delete('Xargadd')
   %argd
   bwipe!
 endfunc

src/version.c

@@ -794,6 +794,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    430,
 /**/
     429,
 /**/