hush: fix hush-bugs/glob_and_vars.tests testcase:

globbing is now done _after_ variable/`cmd` substitution

function                                             old     new   delta
expand_strvec_to_strvec                                7     353    +346
expand_variables                                    1348    1383     +35
add_string_to_strings                                  -      28     +28
globhack                                             114       -    -114
done_word                                            778     579    -199
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 2/1 up/down: 409/-313)           Total: 96 bytes

shell/hush_test/hush-bugs/empty_for.right

@@ -0,0 +1 @@
+OK: 0

shell/hush_test/hush-bugs/empty_for.tests

@@ -0,0 +1,3 @@
+false
+for a in; do echo "HELLO"; done
+echo OK: $?

shell/hush_test/hush-bugs/glob_and_vars.tests

@@ -1,2 +1,2 @@
 v=.
-echo $v/glob_and_vars.*
+echo $v/glob_and_vars.[tr]*

shell/hush_test/hush-vars/glob_and_vars.tests

@@ -0,0 +1,2 @@
+v=.
+echo $v/glob_and_vars.[tr]*