bare-metal: Refactor the plugin code a bit more

* An include files and forward declarations are sorted in an
  alphabetical order.
* Used the 'final' keywords for the methods and classes which
  not should be overridden.
* Used the 'auto' and 'explicit' keywords more.
* A class members are initialized in an initializier list.

Change-Id: Ia74783e47aff92467d696d471760b5a97bca3d7a
Reviewed-by: hjk <hjk@qt.io>

src/plugins/baremetal/iarewparser.cpp

@@ -38,6 +38,8 @@ using namespace ProjectExplorer;
 namespace BareMetal {
 namespace Internal {
 
+// Helpers:
+
 static Task::TaskType taskType(const QString &msgType)
 {
     if (msgType == "Warning")
@@ -47,6 +49,8 @@ static Task::TaskType taskType(const QString &msgType)
     return Task::TaskType::Unknown;
 }
 
+// IarParser
+
 IarParser::IarParser()
 {
     setObjectName("IarParser");