go: Upgrade 1.9 to 1.9.4 stable release

The 1.9.4 fixes a number of issues in the Go compiler and is important
to get in before we start working on 1.10 inclusion.

 - go1.9.1 (released 2017/10/04) includes two security fixes.

 - go1.9.2 (released 2017/10/25) includes fixes to the compiler,
   linker, runtime, documentation, go command, and the crypto/x509,
   database/sql, log, and net/smtp packages. It includes a fix to a
   bug introduced in Go 1.9.1 that broke go get of non-Git
   repositories under certain conditions.

 - go1.9.3 (released 2018/01/22) includes fixes to the compiler,
   runtime, and the database/sql, math/big, net/http, and net/url
   packages.

 - go1.9.4 (released 2018/02/07) includes a security fix to “go get”.

(From OE-Core rev: 150d9d3215bf5d3a21c3f141d4ce837557c5f9f1)

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/go/go-1.9.inc

@@ -1,6 +1,9 @@
 require go-common.inc
 
 GO_BASEVERSION = "1.9"
+GO_MINOR = ".4"
+PV .= "${GO_MINOR}"
+
 FILESEXTRAPATHS_prepend := "${FILE_DIRNAME}/go-${GO_BASEVERSION}:"
 
 LIC_FILES_CHKSUM = "file://LICENSE;md5=5d4950ecb7b26d2c5e4e7b4e0dd74707"
@@ -19,5 +22,5 @@ SRC_URI += "\
 "
 SRC_URI_append_libc-musl = " file://set-external-linker.patch"
 
-SRC_URI[main.md5sum] = "da2d44ea384076efec43ee1f8b7d45d2"
-SRC_URI[main.sha256sum] = "a4ab229028ed167ba1986825751463605264e44868362ca8e7accc8be057e993"
+SRC_URI[main.md5sum] = "6816441fd6680c63865cdd5cb8bc1960"
+SRC_URI[main.sha256sum] = "0573a8df33168977185aa44173305e5a0450f55213600e94541604b75d46dc06"