Install the json package and tests as well as the lib2to3 tests

so the tests work when run from an install directory.
They are currently skipped on the daily runs (not from the buildbots)
for checking refleaks, etc.

Makefile.pre.in

@@ -809,9 +809,10 @@ LIBSUBDIRS=	lib-tk site-packages test test/output test/data \
 		test/decimaltestdata \
 		encodings compiler hotshot \
 		email email/mime email/test email/test/data \
+		json json/tests \
 		sqlite3 sqlite3/test \
 		logging bsddb bsddb/test csv wsgiref \
-		lib2to3 lib2to3/fixes lib2to3/pgen2 \
+		lib2to3 lib2to3/fixes lib2to3/pgen2 lib2to3/tests \
 		ctypes ctypes/test ctypes/macholib idlelib idlelib/Icons \
 		distutils distutils/command distutils/tests $(XMLLIBSUBDIRS) \
 		lib-old \