[Bug testsuite/49375] Target libstdc++.so used by host cc1plus

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49375

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
ppl support was removed with r0-117618-g33ad93b9f4cb21 for GCC 4.8.0.
I Have not looked if ISL requires libstdc++ or is only statically linked yet.