Autotools: Introduce AutotoolsBuildSystem

Introduce AutotoolsBuildSystem and slim down AutotoolsProject.

Change-Id: I68296152f9ecd5d14198c8d0b36a06c2d1b162ec
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/autotoolsprojectmanager/makefileparser.cpp

@@ -30,10 +30,9 @@
 #include <utils/qtcassert.h>
 #include <utils/qtcprocess.h>
 
-#include <QFile>
 #include <QDir>
-#include <QFileInfoList>
-#include <QMutexLocker>
+#include <QFile>
+#include <QFileInfo>
 
 using namespace AutotoolsProjectManager::Internal;
 
@@ -49,7 +48,7 @@ bool MakefileParser::parse()
 {
     m_mutex.lock();
     m_cancel = false;
-    m_mutex.unlock(),
+    m_mutex.unlock();
 
     m_success = true;
     m_executable.clear();