CMakeLists: Make -Wreorder a compile-time error

This can result in silent logic bugs within code, and given the amount
of times these kind of warnings are caused, they should be flagged at
compile-time so no new code is submitted with them.

src/CMakeLists.txt

@@ -53,6 +53,7 @@ if (MSVC)
 else()
     add_compile_options(
         -Wall
+        -Werror=reorder
         -Wno-attributes
     )
 

src/core/hle/kernel/kernel.cpp

@@ -103,7 +103,7 @@ static void ThreadWakeupCallback(u64 thread_handle, [[maybe_unused]] s64 cycles_
 
 struct KernelCore::Impl {
     explicit Impl(Core::System& system, KernelCore& kernel)
-        : system{system}, global_scheduler{kernel}, synchronization{system}, time_manager{system} {}
+        : global_scheduler{kernel}, synchronization{system}, time_manager{system}, system{system} {}
 
     void Initialize(KernelCore& kernel) {
         Shutdown();

src/video_core/gpu_asynch.cpp

@@ -12,8 +12,9 @@ namespace VideoCommon {
 
 GPUAsynch::GPUAsynch(Core::System& system, std::unique_ptr<VideoCore::RendererBase>&& renderer_,
                      std::unique_ptr<Core::Frontend::GraphicsContext>&& context)
-    : GPU(system, std::move(renderer_), true), gpu_thread{system}, gpu_context(std::move(context)),
-      cpu_context(renderer->GetRenderWindow().CreateSharedContext()) {}
+    : GPU(system, std::move(renderer_), true), gpu_thread{system},
+      cpu_context(renderer->GetRenderWindow().CreateSharedContext()),
+      gpu_context(std::move(context)) {}
 
 GPUAsynch::~GPUAsynch() = default;
 

src/video_core/renderer_opengl/renderer_opengl.cpp

@@ -315,8 +315,8 @@ public:
 
 RendererOpenGL::RendererOpenGL(Core::Frontend::EmuWindow& emu_window, Core::System& system,
                                Core::Frontend::GraphicsContext& context)
-    : VideoCore::RendererBase{emu_window}, emu_window{emu_window}, system{system},
-      frame_mailbox{}, context{context}, has_debug_tool{HasDebugTool()} {}
+    : RendererBase{emu_window}, emu_window{emu_window}, system{system}, context{context},
+      has_debug_tool{HasDebugTool()} {}
 
 RendererOpenGL::~RendererOpenGL() = default;