oqs-provider: add CI test

This runs a couple of openssl commands to verify that the provider is
loading and generate a private key, without any output checks.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
[ use APK and improve commit title ]
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

libs/oqs-provider/test.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+test_oqsprovider() {
+	RET=0
+	apk add openssl-util
+	openssl list -all-algorithms | grep oqsprovider || RET=1
+	openssl genpkey -verbose -algorithm mayo1 -text || RET=1
+	exit $RET
+}
+
+case "$1" in
+	libopenssl-oqsprovider)
+		test_oqsprovider
+		;;
+	*)
+		echo "Unexpected package '$1'" >&2
+		exit 1
+		;;
+esac