test/Makefile dclean cleans out a few files too many.

The files removed are the ones that were symbolic links before, but
aren't now, so we should not remove them any more.
Reviewed-by: NStephen Henson <steve@openssl.org>

test/Makefile

@@ -405,8 +405,7 @@ depend:
 dclean:
 	$(PERL) -pe 'if (/^# DO NOT DELETE THIS LINE/) {print; exit(0);}' $(MAKEFILE) >Makefile.new
 	mv -f Makefile.new $(MAKEFILE)
-	rm -f $(SRC) $(SHA256TEST).c $(SHA512TEST).c evptests.txt newkey.pem testkey.pem \
-			testreq.pem
+	rm -f newkey.pem testkey.pem testreq.pem
 
 clean:
 	rm -f .rnd tmp.bntest tmp.bctest *.o *.obj *.dll lib tags core .pure .nfs* *.old *.bak fluff $(EXE) *.ss *.srl log dummytest