[Bug go/79146] New: Bootstrpping go on s390x fails; redefined symbols

["vogt at linux dot vnet.ibm.com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79146

            Bug ID: 79146
           Summary: Bootstrpping go on s390x fails; redefined symbols
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: go
          Assignee: ian at airs dot com
          Reporter: vogt at linux dot vnet.ibm.com
                CC: cmang at google dot com, krebbel at gcc dot gnu.org
  Target Milestone: ---
              Host: s390x
            Target: s390x

Bootstrapping on s390x fails with these errors:

.../gcc/libgo/go/crypto/elliptic/p256_s390x.go:24:2: error: redefinition of
‘p256’
  p256        Curve
  ^
.../libgo/go/crypto/elliptic/p256_generic.go:10:2: note: previous definition of
‘p256’ was here
  p256 p256Curve
  ^
.../libgo/go/crypto/elliptic/p256_s390x.go:34:1: error: redefinition of
‘initP256Arch’
 func initP256Arch() {
 ^
.../libgo/go/crypto/elliptic/p256_generic.go:13:1: note: previous definition of
‘initP256Arch’ was here
 func initP256Arch() {
 ^
.../libgo/go/crypto/elliptic/p256_s390x.go:36:8: error: incompatible types in
assignment (cannot use type p256CurveFast as type p256Curve)
   p256 = p256CurveFast{p256Params}
        ^