Revert stdout/stderr to the initial ones in a few places.
Revert stdout/stderr to the initial ones in a few places.

There are some situations where scons error messages can just disappear,
and sometimes it's because a build rule or an SConscript or something has
temporarily redirected stdout/stderr.

andrewyoung1991/scons,andrewyoung1991/scons,andrewyoung1991/scons,andrewyoung1991/scons,andrewyoung1991/scons,andrewyoung1991/scons,andrewyoung1991/scons,andrewyoung1991/scons,andrewyoung1991/scons