Forward IOException in ClassFileArchiveEntryHandler::toClassFile

While the exception itself might not be very helpful (Javassist, for example, can throw rather cryptic ones) including at least makes the visible.

hibernate-core/src/main/java/org/hibernate/boot/archive/scan/spi/ClassFileArchiveEntryHandler.java

@@ -61,7 +61,7 @@ public class ClassFileArchiveEntryHandler implements ArchiveEntryHandler {
 			return new ClassFile( dataInputStream );
 		}
 		catch (IOException e) {
-			throw new ArchiveException( "Could not build ClassFile" );
+			throw new ArchiveException( "Could not build ClassFile", e );
 		}
 		finally {
 			try {