Reinstantiated full tests.

The fix to Types in 9bb3551 (Retract of optimization in computeDenot)
allowed the two tests to compile "twice" again.

Author: odersky

test/dotc/tests.scala

@@ -104,12 +104,12 @@ class tests extends CompilerTest {
   @Test def dotc_ast = compileDir(dotcDir + "tools/dotc/ast", twice)
   @Test def dotc_config = compileDir(dotcDir + "tools/dotc/config", twice)
   @Test def dotc_core = compileDir(dotcDir + "tools/dotc/core", twice)(allowDeepSubtypes)
-  @Test def dotc_core_pickling = compileDir(dotcDir + "tools/dotc/core/pickling"/*, twice*/)(allowDeepSubtypes)
+  @Test def dotc_core_pickling = compileDir(dotcDir + "tools/dotc/core/pickling", twice)(allowDeepSubtypes)
   @Test def dotc_transform = compileDir(dotcDir + "tools/dotc/transform", twice)
   @Test def dotc_parsing = compileDir(dotcDir + "tools/dotc/parsing", twice)
   @Test def dotc_printing = compileDir(dotcDir + "tools/dotc/printing", twice)
   @Test def dotc_reporting = compileDir(dotcDir + "tools/dotc/reporting", twice)
-  @Test def dotc_typer = compileDir(dotcDir + "tools/dotc/typer"/*, twice*/)
+  @Test def dotc_typer = compileDir(dotcDir + "tools/dotc/typer", twice)
   @Test def dotc_util = compileDir(dotcDir + "tools/dotc/util", twice)
   @Test def tools_io = compileDir(dotcDir + "tools/io", twice)
   //@Test def tools = compileDir(dotcDir + "tools", "-deep" :: Nil)(allowDeepSubtypes)