[PATCH, libstdc++]: Fix scripts/extract_symvers to remove extra [<other>: xx] field

[Paolo Carlini]

Hi,
> Fixes these abi failures.
>
> 2009-01-12  Uros Bizjak  <ubizjak@gmail.com>
>
> 	* scripts/extract_symvers: Add sed script to remove ' [<other>: xx] '
> 	field from readelf output.
>
> Patch was tested on alphaev56-unknown-linux-gnu and
> x86_64-pc-linux-gnu. OK for 4.3 and 4.4 ?
>   
Patch makes sense to me. Please give Benjamin (the original author of
this code) a chance to have a look and then go ahead.

Thanks,
Paolo.