golang update to 1.12.1 and add ppc64 linker support

Signed-off-by: basebuilder_pel7ppc64bebuilder0 <basebuilder@powerel.org>

SOURCES/golang-ppc64-linker.patch

@@ -0,0 +1,30 @@
+--- src/cmd/link/internal/ld/config.go	2019-03-14 20:43:37.000000000 +0100
++++ src/cmd/link/internal/ld/config.go	2019-03-20 23:50:07.660000000 +0100
+@@ -247,9 +247,6 @@
+			}
+			ctxt.LinkMode = LinkInternal
+		case "1":
+-			if objabi.GOARCH == "ppc64" {
+-				Exitf("external linking requested via GO_EXTLINK_ENABLED but not supported for %s/ppc64", objabi.GOOS)
+-			}
+			ctxt.LinkMode = LinkExternal
+		default:
+			if needed, _ := mustLinkExternal(ctxt); needed {
+@@ -261,17 +258,10 @@
+			} else {
+				ctxt.LinkMode = LinkInternal
+			}
+-			if objabi.GOARCH == "ppc64" && ctxt.LinkMode == LinkExternal {
+-				Exitf("external linking is not supported for %s/ppc64", objabi.GOOS)
+-			}
+		}
+	case LinkInternal:
+		if needed, reason := mustLinkExternal(ctxt); needed {
+			Exitf("internal linking requested but external linking required: %s", reason)
+		}
+-	case LinkExternal:
+-		if objabi.GOARCH == "ppc64" {
+-			Exitf("external linking not supported for %s/ppc64", objabi.GOOS)
+-		}
+	}
+ }

SPECS/golang.spec

@@ -101,11 +101,11 @@
 %global gohostarch  s390x
 %endif
 
-%global go_api 1.12
+%global go_api 1.12.1
-%global go_version 1.12
+%global go_version 1.12.1
 
 Name:           golang
-Version:        1.12
+Version:        1.12.1
 Release:        1%{?dist}
 Summary:        The Go Programming Language
 # source tree includes several copies of Mark.Twain-Tom.Sawyer.txt under Public Domain
@@ -183,6 +183,7 @@ Requires:       go-srpm-macros
 
 Patch1:       0001-Don-t-use-the-bundled-tzdata-at-runtime-except-for-t.patch
 Patch2:       0002-syscall-expose-IfInfomsg.X__ifi_pad-on-s390x.patch
+Patch3:       golang-ppc64-linker.patch
 
 # Having documentation separate was broken
 Obsoletes:      %{name}-docs < 1.1-4
@@ -308,6 +309,7 @@ Requires:       %{name} = %{version}-%{release}
 
 %patch1 -p1
 %patch2 -p1
+%patch3 -p0
 
 cp %{SOURCE1} ./src/runtime/