RFA: fix libstdc++ pretty-printer test

[Tom Tromey]

The pretty-printer test "shared_ptr.cc" fails for me on x86-64 Fedora 18.
The local variable "esp" is optimized out.

Since the purpose of this test is to test the pretty-printers, it seemed
simplest to me to just disable optimizations.  The appended fixes the
problem for me.

Ok?

Tom

2013-06-05  Tom Tromey  <tromey@redhat.com>

	* testsuite/libstdc++-prettyprinters/shared_ptr.cc: Use -O0.

diff --git a/libstdc++-v3/testsuite/libstdc++-prettyprinters/shared_ptr.cc b/libstdc++-v3/testsuite/libstdc++-prettyprinters/shared_ptr.cc
index 547213f..0e4e6c2 100644
--- a/libstdc++-v3/testsuite/libstdc++-prettyprinters/shared_ptr.cc
+++ b/libstdc++-v3/testsuite/libstdc++-prettyprinters/shared_ptr.cc
@@ -1,5 +1,5 @@
 // { dg-do run }
-// { dg-options "-std=gnu++11 -g" }
+// { dg-options "-std=gnu++11 -g -O0" }
 
 // Copyright (C) 2012-2013 Free Software Foundation, Inc.
 //