hush: getopts builtin

function                                             old     new   delta
builtin_getopts                                        -     271    +271
bltins1                                              372     384     +12
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(add/remove: 1/0 grow/shrink: 1/0 up/down: 283/0)             Total: 283 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/hush_test/hush-getopts/getopt_positional.tests b/shell/hush_test/hush-getopts/getopt_positional.tests
new file mode 100755
index 0000000..a5404a2
--- /dev/null
+++ b/shell/hush_test/hush-getopts/getopt_positional.tests
@@ -0,0 +1,8 @@
+set -- -q -w -e r -t -y
+echo "*** no OPTIND, optstring:'we' args:$*"
+var=QWERTY
+while getopts "we" var; do
+	echo "var:'$var' OPTIND:$OPTIND"
+done
+# unfortunately, "rc:0" is shown since while's overall exitcode is "success"
+echo "exited: var:'$var' OPTIND:$OPTIND"