Merge from trunk (now lexical_cast has optimized conversions to and from array<>, fixes #7065)

[SVN r79364]

test/Jamfile.v2

@@ -47,5 +47,7 @@ test-suite conversion
       <toolset>gcc-4.7:<cflags>-fno-exceptions
     ]
     [ run lexical_cast_iterator_range_test.cpp ]
+    [ run lexical_cast_arrays_test.cpp ]
+    [ run lexical_cast_integral_types_test.cpp ]
   ;