Bug#853428: Fixed in 1.7.6-1

[Hilko Bengen]

Control: fixed -1 1.7.6-1

Version 1.7.6-1 of package golang-1.7 builds just fine on unstable using
gcc-7. (Apparently, there is an FTBFS issue on arm64, but that seems to
be a different matter.)

Cheers,
-Hilko