add support for s390x with go1.7

[andrewhsu]

Go 1.7 adds support for s390x. This PR changes gox to be able to compile on it.

Tests pass:

$ go test
PASS
ok  	github.com/andrewhsu/gox	0.194s

Example compile using gox specifying s390x

$ gox -osarch=linux/s390x github.com/docker/cli/cmd/docker
Number of parallel builds: 3

-->     linux/s390x: github.com/docker/cli/cmd/docker
$ file docker_linux_s390x 
docker_linux_s390x: ELF 64-bit MSB executable, IBM S/390, version 1 (SYSV), statically linked, not stripped

[kbhute-ibm]

+1

The fix even works for me. Could you please tell us by when this PR will get merged to master?

[kbhute-ibm]

Hi Team,

May I know if there is any plan to merge this PR? Thanks in advance.

[kbhute-ibm]

Hi @mitchellh

Could you please tell me if there are any plans to merge this PR?

[mattfarina]

@andrewhsu and @kbhute-ibm I'll take a look at this. It would be great to support more platforms.

[Nayana-ibm]

@mattfarina
I have revised patch as below to support s390x platform:

diff --git a/platform.go b/platform.go
index 89401fc..00cc0f6 100644
--- a/platform.go
+++ b/platform.go
@@ -42,6 +42,7 @@ var (
                "arm64",
                "ppc64",
                "ppc64le",
+               "s390x",
        }

        Platforms_1_0 = []Platform{
@@ -86,6 +87,7 @@ var (
                {"linux", "arm64", false},
                {"linux", "ppc64", false},
                {"linux", "ppc64le", false},
+               {"linux", "s390x", false},
        }...)
 )

Could you please take a look?

[ruflin]

I think this PR becomes obsolete if #96 is merged?

[Nayana-ibm]

@ruflin Yes. Code changes provided in #96 will cover this PR.

[Nayana-ibm]

Covered by #96

[Nayana-ibm]

Can be closed.