[machineid][hostinfo] Reduce warnings

- stray ;
 - clang-tidy had re-ordered the moc-warnings.h header, needs to go
   **before** the .moc so split into its own group

src/modules/hostinfo/Tests.cpp

@@ -65,5 +65,6 @@ HostInfoTests::testHostOS()
 
 QTEST_GUILESS_MAIN( HostInfoTests )
 
-#include "Tests.moc"
 #include "utils/moc-warnings.h"
+
+#include "Tests.moc"

src/modules/machineid/Tests.cpp

@@ -104,5 +104,6 @@ MachineIdTests::testPoolSize()
 
 QTEST_GUILESS_MAIN( MachineIdTests )
 
-#include "Tests.moc"
 #include "utils/moc-warnings.h"
+
+#include "Tests.moc"

src/modules/machineid/Workers.cpp

@@ -192,7 +192,7 @@ createDBusMachineId( const QString& rootMountPoint, const QString& fileName )
 Calamares::JobResult
 createDBusLink( const QString& rootMountPoint, const QString& fileName, const QString& systemdFileName )
 {
-    Q_UNUSED( rootMountPoint );
+    Q_UNUSED( rootMountPoint )
     return runCmd( QStringList { QStringLiteral( "ln" ), QStringLiteral( "-s" ), systemdFileName, fileName } );
 }