This update for go1.9 fixes the following issues:

- Fix for bootstrap to work gcc other than gcc9 at armv7l. (bsc#974800)
- Fix for build failures with gcc7. (bsc#1121397)
- Set GOPATH automatically and removes go.sh and GOROOT, in order to make switching between versions no longer break. (bsc#1119634)
- Fix for an issue in build when symlinks pointing to versions that were never installed at all. (bsc#1082409)

This update was imported from the SUSE:SLE-15:Update update project.