go: update to 1.9.

Closes #6931

srcpkgs/go/template

@@ -1,8 +1,8 @@
 # Template file for 'go'
 pkgname=go
 _bootstrap_version=1.4.2
-version=1.8.3
-revision=2
+version=1.9
+revision=1
 wrksrc=go
 hostmakedepends="git ca-certificates"
 short_desc="The Go Programming Language"
@@ -12,7 +12,7 @@ license="BSD"
 distfiles="http://golang.org/dl/go${_bootstrap_version}.src.tar.gz
  http://golang.org/dl/go${version}.src.tar.gz"
 checksum="299a6fd8f8adfdce15bc06bde926e7b252ae8e24dd5b16b7d8791ed79e7b5e9b
- 5f5dea2447e7dcfdc50fa6b94c512e58bfba5673c039259fd843f68829d99fa6"
+ a4ab229028ed167ba1986825751463605264e44868362ca8e7accc8be057e993"
 
 nostrip=yes
 noverifyrdeps=yes
@@ -89,12 +89,11 @@ do_build() {
 	GOARCH=$targetarch
 
 	git clone https://go.googlesource.com/tools \
-		-b release-branch.go$(echo "$version" | cut -d "." -f "1-2") \
+		-b release-branch.go$(echo "${version}" | cut -d "." -f "1-2") \
 		$GOPATH/src/golang.org/x/tools
 
-	for tool in godoc cover; do
-		$GOROOT/bin/go install golang.org/x/tools/cmd/${tool}
-	done
+	$GOROOT/bin/go install golang.org/x/tools/cmd/godoc
+	mv ${GOPATH}/bin/godoc ${GOROOT}/bin/
 }
 
 do_install() {