Go builds broken in arm7l (rpi armv7) go tries to install amd64 dependency on arm

[symgryph]

• [*] ran brew update and can still reproduce the problem?
• [ *] ran brew doctor, fixed all issues and can still reproduce the problem?
• [x] ran brew config and brew doctor and included their output with your issue?

  HOMEBREW_VERSION: 1.6.3
  ORIGIN: https://github.com/Linuxbrew/brew.git
  HEAD: b67917c837f1fb9c5bf2494cfd89b4eee6802802
  Last commit: 10 days ago
  Core tap ORIGIN: https://github.com/Linuxbrew/homebrew-core
  Core tap HEAD: b142559afe0a2715007b67d71c6957c5f0193c4a
  Core tap last commit: 7 hours ago
  HOMEBREW_PREFIX: /mnt/brew/.linuxbrew
  HOMEBREW_REPOSITORY: /mnt/brew/.linuxbrew
  HOMEBREW_CELLAR: /mnt/brew/.linuxbrew/Cellar
  HOMEBREW_CACHE: /home/tmunn/.cache/Homebrew
  CPU: octa-core 32-bit arm
  Homebrew Ruby: 2.3.3 => /mnt/brew/.linuxbrew/Library/Homebrew/vendor/portable-ruby/2.3.3_2/bin/ruby
  Clang: N/A
  Git: 2.7.4 => /usr/bin/git
  Curl: 7.47.0 => /usr/bin/curl
  Java: N/A
  Kernel: Linux 4.9.61-odroidxu4 armv7l GNU/Linux
  OS: Ubuntu 16.04.4 LTS (xenial)
  Host glibc: 2.23
  /usr/bin/gcc: 5.4.0
  glibc: N/A
  gcc: N/A
  xorg: N/A

  brew doctor output:

brew doctor
Your system is ready to brew.

To help us debug your issue please explain:

• What you were trying to do (and why)
• What happened (include command output)
• What you expected to happen
• Step-by-step reproduction instructions (by running brew commands)

I was trying to install Hugo go program

brew install hugo

tmunn@gitlab:~$ brew install hugo
==> Installing dependencies for hugo: go, dep
==> Installing hugo dependency: go
==> Downloading https://dl.google.com/go/go1.10.2.src.tar.gz
Already downloaded: /home/tmunn/.cache/Homebrew/go-1.10.2.tar.gz
==> Downloading https://storage.googleapis.com/golang/go1.7.linux-amd64.tar.gz
Already downloaded: /home/tmunn/.cache/Homebrew/go--gobootstrap-1.7.tar.gz
==> ./make.bash --no-clean
Last 15 lines from /home/tmunn/.cache/Homebrew/Logs/go/01.make.bash:
2018-05-16 00:06:58 -0400

./make.bash
--no-clean

Building Go cmd/dist using /tmp/go-20180516-10055-1ez1ahg/go/gobootstrap.
./make.bash: line 165: /tmp/go-20180516-10055-1ez1ahg/go/gobootstrap/bin/go: cannot execute binary file: Exec format error

[sjackman]

Hi, Thomas. ARM is supported on a best-effort basis. Many formulae may not work on ARM. A PR to fix go is most welcome, but we do not have the time ourselves to work on this issue. To get started fixing it, run brew edit go.