ClangPchManagerBackend: Fix build warnings

Change-Id: Ic5159ba09b6ce3d7d64dadc454268a34dd85f2a4
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/tools/clangpchmanagerbackend/clangpchmanagerbackendmain.cpp

@@ -65,7 +65,7 @@ public:
         return QString(CLANG_COMPILER_PATH);
     }
 
-    uint hardwareConcurrency() const
+    uint hardwareConcurrency() const override
     {
         return std::thread::hardware_concurrency();
     }

src/tools/clangpchmanagerbackend/source/clangpchmanagerbackend-source.pri

@@ -13,6 +13,7 @@ SOURCES += \
     $$PWD/pchgeneratorinterface.cpp
 
 HEADERS += \
+    $$PWD/pchmanagerserver.h \
     $$PWD/clangpchmanagerbackend_global.h \
     $$PWD/pchnotcreatederror.h \
     $$PWD/environment.h \

src/tools/clangpchmanagerbackend/source/collectincludestoolaction.h

@@ -58,7 +58,7 @@ public:
                                                                     diagnosticConsumer);
     }
 
-    clang::FrontendAction *create()
+    clang::FrontendAction *create() override
     {
         return new CollectIncludesAction(m_includeIds,
                                          m_filePathCache,

src/tools/clangpchmanagerbackend/source/environment.h

@@ -32,6 +32,7 @@ namespace ClangBackEnd {
 class Environment
 {
 public:
+    virtual ~Environment() = default;
     virtual QString pchBuildDirectory() const = 0;
     virtual QString clangCompilerPath() const = 0;
     virtual uint hardwareConcurrency() const = 0;