Pass the EV_TESTED flag to the left operand of NSEMI nodes. This fixes

two cases of unwanted termination with set -e:

* if-commands containing several commands separated by semicolons, eg

	if false; false; then [...]

* functions with an explicitely tested exit status that contain a failing
  command which is not the last one, eg

	f() {
		false
		false
	}
	f || true

PR:	77067, 85267
Briefly reviewed by:	cracauer

bin/sh/eval.c

@@ -196,7 +196,7 @@ evaltree(union node *n, int flags)
 	TRACE(("evaltree(%p: %d) called\n", (void *)n, n->type));
 	switch (n->type) {
 	case NSEMI:
-		evaltree(n->nbinary.ch1, 0);
+		evaltree(n->nbinary.ch1, flags & ~EV_EXIT);
 		if (evalskip)
 			goto out;
 		evaltree(n->nbinary.ch2, flags);