[Boost-build] Fix the gcc toolset for applying c++ features

Subject: [Boost-build] Fix the gcc toolset for applying c++ features
From: Alexey Nikitin (alleonik_at_[hidden])
Date: 2012-04-27 06:00:36

Hi,

Now gcc toolset not correct processed features <rtti>off and
<exception-handling>off. First applied not only c++ and second not
processed anyway. I propose a patch to fix this.

Best regards,
Alexey.