fix(version): create version_generated.go in cmd/ (canonical#90)

Author: rebornplusplus

cmd/mkversion.sh

@@ -67,7 +67,7 @@ fi
 
 echo "*** Setting version to '$v' from $o." >&2
 
-cat <<EOF > "$GO_GENERATE_BUILDDIR/version_generated.go"
+cat <<EOF > "$GO_GENERATE_BUILDDIR/cmd/version_generated.go"
 package cmd
 
 // generated by mkversion.sh; do not edit