Updated Go configure test.

auto/modules/go/conf

@@ -3,18 +3,27 @@
 # Copyright (C) NGINX, Inc.
 
 
+$echo -n "checking for Go ..."
+$echo -n "checking for Go ..." >> $NXT_AUTOCONF_ERR
+
 NXT_GO_VERSION="`${NXT_GO} version`"
 
-GOPATH=`pwd` CGO_CPPFLAGS="-DNXT_CONFIGURE" "${NXT_GO}" build -o build/nxt_go_gen.a --buildmode=c-archive nginext
+if /bin/sh -c "GOPATH=`pwd` CGO_CPPFLAGS=-DNXT_CONFIGURE \
+    \"${NXT_GO}\" build -o build/nxt_go_gen.a --buildmode=c-archive nginext" \
+    >> $NXT_AUTOCONF_ERR 2>&1;
 
-if [ "$?" -ne 0 ]; then
+then
+    $echo " found"
+    $echo " + Go version: ${NXT_GO_VERSION}"
+
+else
     $echo
-    $echo $0: error: no go found.
+    $echo
+    $echo $0: error: Go not found.
     $echo
     exit 1;
 fi
 
-$echo " + go version: ${NXT_GO_VERSION}"
 
 NXT_GO_MODULE_SRCS=" \
     src/nxt_go.c \