go-helloworld: Turn into a go module enabled build

(From OE-Core rev: 86aacbc889830846150ff2d0f1cd7ba00a2c10f6)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/go-examples/go-helloworld_0.1.bb

@@ -6,13 +6,14 @@ LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
 
 SRC_URI = "git://${GO_IMPORT}"
-SRCREV = "46695d81d1fae905a270fb7db8a4d11a334562fe"
+SRCREV = "bcf50bfd7dcd8020c90965747d857ae42802e0c5"
 UPSTREAM_CHECK_COMMITS = "1"
 
 GO_IMPORT = "github.com/golang/example"
 GO_INSTALL = "${GO_IMPORT}/hello"
+GO_WORKDIR = "${GO_INSTALL}"
 
-inherit go
+inherit go-mod
 
 # This is just to make clear where this example is
 do_install_append() {