Add shell script in testsuite/compiler/canonical for replicating known issues

Ideally this is integrated into proper test suite, but that's too much overhead for now

testsuite/compiler/canonical/Phrasebook.gf

@@ -0,0 +1,8 @@
+abstract Phrasebook = 
+  Greetings,
+  Words
+  ** {
+
+flags startcat = Phrase ;
+
+}