InitHeaderSearch.cpp for gentoo

Dear list,

the current head version of SVN does not work for me with Gentoo. I
get the error:
  fatal error: 'cxxabi.h' file not found

I see that you provide:

      "i686-pc-linux-gnu", "", "", triple);

I needed to add

      "i686-pc-linux-gnu", "", "", triple);
(Note the removal of g++-v4)

With this modification everything worked for me.


Btw. the output of `gcc -v -x c++ /dev/null -fsyntax-only` contains
even a few more paths: