component/golang: make sure build fail if anything goes wrong

Run this whole script in `set -e` so that if any of the go install
fail buildout exit with error.

component/golang/buildout.cfg

@@ -182,7 +182,8 @@ stop-on-error = true
 # clients can put program list to install to gowork:install
 [gowork.goinstall]
 recipe  = plone.recipe.command
-command = bash -c ". ${gowork:env.sh} &&
+command = bash -c ". ${gowork:env.sh}
+	set -e
 	for x in $(echo -n '${gowork:install}' |tr '\n' ' '); do
 		case "\$x" in