[initramfs] Warnings--

Initializing the JobQuene (and hence Global Storage) and
the System instance is a bit odd, avoid unused-variable
warning with an ugly cast instead.

src/modules/initramfs/Tests.cpp

@@ -46,7 +46,7 @@ InitramfsTests::initTestCase()
 {
     Logger::setupLogLevel( Logger::LOGDEBUG );
 
-    auto* j = new Calamares::JobQueue();
+    (void) new Calamares::JobQueue();
     (void) new CalamaresUtils::System( true );
 }