split the testsuite to different directories for compiler, runtime and libraries

testsuite/runtime/paraphrase/CityEng.gf

@@ -0,0 +1,16 @@
+concrete CityEng of City = {
+
+lincat S, City, Country, Adj = Str ;
+
+lin
+  PredIn ci co = ci ++ "is in" ++ co ;
+  PredAdj ci ad = ci ++ "is" ++ ad ;
+  Capital co = "the capital of" ++ co ;
+  CountryAdj ad = "the" ++ ad ++ "country" ;
+  Stockholm = "Stockholm" ;
+  Helsinki = "Helsinki" ;
+  Sweden = "Sweden" ;
+  Finland = "Finland" ;
+  Swedish = "Swedish" ;
+  Finnish = "Finnish" ;
+}