Declare more TypeClass instances as builtin.

Another difference to DMD. With the new TypeInfo, this should work now.

gen/typinf.cpp

@@ -267,13 +267,7 @@ int TypeClass::builtinTypeInfo()
     /* This is statically put out with the ClassInfo, so
      * claim it is built in so it isn't regenerated by each module.
      */
-#if IN_DMD
     return mod ? 0 : 1;
-#elif IN_LLVM
-    // FIXME if I enable this, the way LDC does typeinfo will cause a bunch
-    // of linker errors to missing class typeinfo definitions.
-    return 0;
-#endif
 }
 
 /* ========================================================================= */