Add no-PIC patch for golang

See docker-library/golang#91 for details.

scripts/golang/install.sh

@@ -16,6 +16,9 @@ goroot_bootstrap=${bootstrap_prefix}/go
 go_archive=/golang.tar.gz
 go_root=${prefix}/go
 
+# https://golang.org/issue/14851
+no_pic_patch="$(dirname $0)/no-pic.patch"
+
 golang_url() {
 	printf "https://golang.org/dl/go%s.src.tar.gz" "$1"
 }
@@ -53,6 +56,7 @@ rm -f "${go_archive}"
 # Build golang.
 export GOROOT_BOOTSTRAP=${goroot_bootstrap}
 cd "${go_root}/src"
+patch -p2 -i "${no_pic_patch}"
 ./make.bash
 
 # Remove bootstrap package.

scripts/golang/no-pic.patch

@@ -0,0 +1,16 @@
+diff --git a/src/cmd/link/internal/ld/lib.go b/src/cmd/link/internal/ld/lib.go
+index 8ccbec9dd634..4e96bfadc260 100644
+--- a/src/cmd/link/internal/ld/lib.go
++++ b/src/cmd/link/internal/ld/lib.go
+@@ -1194,6 +1194,11 @@ func hostlink() {
+ 		argv = append(argv, peimporteddlls()...)
+ 	}
+
++	// The Go linker does not currently support building PIE
++	// executables when using the external linker. See:
++	// https://github.com/golang/go/issues/6940
++	argv = append(argv, "-fno-PIC")
++
+ 	if Debug['v'] != 0 {
+ 		fmt.Fprintf(&Bso, "host link:")
+ 		for _, v := range argv {