build: downgrade maybe-uninitialized from an error to a warning

maybe-uninitialized has false positives in gcc 4.8 due to
Boost ticket #9134 https://svn.boost.org/trac/boost/ticket/9134

refs #1560

Change-Id: I44e2456b31f3a102d4a447da0dc81c23efb31f3b
diff --git a/tools/nfdc.hpp b/tools/nfdc.hpp
index 8734e42..787ca26 100644
--- a/tools/nfdc.hpp
+++ b/tools/nfdc.hpp
@@ -176,7 +176,7 @@
   const char* m_programName;
 
   // command parameters without leading 'cmd' component
-  const char** m_commandLineArguments;
+  const char* const* m_commandLineArguments;
   int m_nOptions;
   uint64_t m_flags;
   uint64_t m_cost;