Don't use hack/make.sh for validate-lint

hack/make.sh now does not make a difference, so simplify.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

hack/validate-lint.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+IFS=$'\n'
+files=( $(find . -name '*.go' | grep -v '^\./vendor/' | sort || true) )
+unset IFS
+
+errors=()
+for f in "${files[@]}"; do
+	failedLint=$(golint "$f")
+	if [ "$failedLint" ]; then
+		errors+=( "$failedLint" )
+	fi
+done
+
+if [ ${#errors[@]} -eq 0 ]; then
+	echo 'Congratulations!  All Go source files have been linted.'
+else
+	{
+		echo "Errors from golint:"
+		for err in "${errors[@]}"; do
+			echo "$err"
+		done
+		echo
+		echo 'Please fix the above errors. You can test via "golint" and commit the result.'
+		echo
+	} >&2
+	exit 1
+fi