Add $(srcdir) in front of the test program's name (else it won't work
when $(srcdir) isn't '.', i.e. when using VPATH).
diff --git a/Makefile.in b/Makefile.in
index 2c92655..eab8e2e 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -158,7 +158,7 @@
# Test the interpreter (twice, once without .pyc files, once with)
TESTPATH= $(srcdir)/Lib:$(srcdir)/Lib/test:./Modules
TESTOPTS=
-TESTPROG= Lib/test/regrtest.py
+TESTPROG= $(srcdir)/Lib/test/regrtest.py
test: python
-rm -f $(srcdir)/Lib/test/*.pyc
PYTHONPATH=$(TESTPATH) ./python $(TESTPROG) $(TESTOPTS)