Bug#876353: gccgo-7: unhandled signal 11 at s390x/ppc64

[Shengjing Zhu <i@zhsj.me>]

> please could you recheck with gcc-snapshot?

Thanks,
gcc-snapshot works

# /usr/lib/gcc-snapshot/bin/go version
go version go1.9 gccgo (Debian 20170917-1) 8.0.0 20170917
(experimental) [trunk revision 252892] linux/ppc64

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Best regards,
Shengjing Zhu