bug#20045: gcc-4.8: Dangling .so references

[Taylan Ulrich Bayırlı/Kammer]

(See the first "Dangling .so references" bug report for more
information.)

/gnu/store/4afh9gyyqiab8pbvvxk3d3k02avm7mh5-gcc-4.8.4-lib/

  
/gnu/store/4afh9gyyqiab8pbvvxk3d3k02avm7mh5-gcc-4.8.4-lib/lib/libstdc++.so.6.0.19
        libgcc_s.so.1 => not found