patch 8.0.1747: MS-Windows: term_start() does not set job_info() cmd

Problem:    MS-Windows: term_start() does not set job_info() cmd.
Solution:   Share the code from job_start() to set jv_argv.
diff --git a/src/terminal.c b/src/terminal.c
index ff76ca1..7afc49d 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -5342,6 +5342,18 @@
     job = job_alloc();
     if (job == NULL)
 	goto failed;
+    if (argvar->v_type == VAR_STRING)
+    {
+	int argc;
+
+	build_argv_from_string(cmd, &job->jv_argv, &argc);
+    }
+    else
+    {
+	int argc;
+
+	build_argv_from_list(argvar->vval.v_list, &job->jv_argv, &argc);
+    }
 
     if (opt->jo_set & JO_IN_BUF)
 	job->jv_in_buf = buflist_findnr(opt->jo_io_buf[PART_IN]);