include needed file for out_of_range

Upstream yocto appears to have removed a free include that provided the
def of the std::out_of_range. This causes compile failures when
bringing in the new yocto.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: Ib140320d2de81b333d21e66813af9c03d57085ce
diff --git a/extensions/openpower-pels/stream.hpp b/extensions/openpower-pels/stream.hpp
index 1a776f6..0785f0e 100644
--- a/extensions/openpower-pels/stream.hpp
+++ b/extensions/openpower-pels/stream.hpp
@@ -6,6 +6,7 @@
 #include <cassert>
 #include <cstring>
 #include <memory>
+#include <stdexcept>
 #include <string>
 #include <vector>