Security update for go1.11 (important)

This new package for go1.11 fixes the following issues:

Security issues fixed:

• CVE-2018-16873: Fixed a remote code execution in go get, when executed
  with the -u flag (bsc#1118897)
• CVE-2018-16874: Fixed an arbitrary filesystem write in go get, which
  could lead to code execution (bsc#1118898)
• CVE-2018-16875: Fixed a Denial of Service in the crypto/x509 package
  during certificate chain validation(bsc#1118899)

Non-security issues fixed:

• Fixed build error with PIE linker flags on ppc64le (bsc#1113978
  bsc#1098017)
• Make profile.d/go.sh no longer set GOROOT=, in order to make switching
  between versions no longer break. This ends up removing the need for
  go.sh entirely (because GOPATH is also set automatically) (bsc#1119634)

The following tracked regression fix is included:

• Fix a regression that broke go get for import path patterns containing
  "…" (bsc#1119706)