logic: Added PCH support to CDB source groups (issue #311)

* added PCH Flags list and checkbox to reuse compiler flags and cdb flags to source group setup
* added UI tests for C++ and CDB source groups

src/lib_cxx/project/utilitySourceGroupCxx.h

@@ -0,0 +1,19 @@
+#ifndef UTILITY_SOURCE_GROUP_CXX_H
+#define UTILITY_SOURCE_GROUP_CXX_H
+
+#include <memory>
+#include <string>
+#include <vector>
+
+class DialogView;
+class SourceGroupSettingsCxx;
+class Task;
+
+namespace utility
+{
+	std::shared_ptr<Task> createBuildPchTask(
+		const SourceGroupSettingsCxx* settings, std::vector<std::wstring> compilerFlags, std::shared_ptr<DialogView> dialogView);
+	std::vector<std::wstring> getIncludePchFlags(const SourceGroupSettingsCxx* settings);
+}
+
+#endif // UTILITY_SOURCE_GROUP_CXX_H