CMake: Cache CMakeCache.txt

Change-Id: Ib3e7a9943d15a2e90afd29642b666892ba7b0613
Reviewed-by: Tim Jenssen <tim.jenssen@theqtcompany.com>

src/plugins/cmakeprojectmanager/builddirmanager.h

@@ -112,6 +112,7 @@ private:
     const CMakeBuildConfiguration *m_buildConfiguration = nullptr;
     Utils::QtcProcess *m_cmakeProcess = nullptr;
     QTemporaryDir *m_tempDir = nullptr;
+    mutable CMakeConfig m_cmakeCache;
 
     QSet<Utils::FileName> m_watchedFiles;
     QString m_projectName;