libstdc++ test framework, minor improvement

[Benjamin Kosnik]

I did this. I commented it out because it wasn't working, and I didn't 
want people to get all in a huff because of the warnings.

-benjamin

> *************** proc libstdc++-dg-init { args } {
> *** 61,75 ****
>       
>       # mkcheck.in used to output these information.
>       set output [remote_exec host $lib_env(CXX) -v]
> !     if { [lindex $output 0] == 0 } {
> !       set output [lindex $output 1]
> !       regexp "gcc version.*$" $output version
> !       regsub "\n+" $version "" version
> !       clone_output "Compiler: $version"
> !       clone_output "Compiler flags: $lib_env(CXXFLAGS)"
> !     } else {
> !       perror "Cannot determine compiler version: [lindex $output 1]"
> !     }
>   }