Don't use GetEmulatedTime in GCMemcard

GCMemcard is only used outside of the core and has
no real reason to use the core's RTC. GetEmulatedTime
isn't designed to be called when the core isn't running.
Should fix https://bugs.dolphin-emu.org/issues/9871

Source/Core/Core/HW/GCMemcard.h

@@ -11,6 +11,7 @@
 #include "Common/CommonTypes.h"
 #include "Common/NandPaths.h"
 #include "Common/NonCopyable.h"
+#include "Common/Timer.h"
 
 #include "Core/HW/EXI_DeviceIPL.h"
 #include "Core/HW/Sram.h"
@@ -131,7 +132,7 @@ struct Header  // Offset    Size    Description
     memset(this, 0xFF, BLOCK_SIZE);
     *(u16*)SizeMb = BE16(sizeMb);
     Encoding = BE16(shift_jis ? 1 : 0);
-    u64 rand = CEXIIPL::GetEmulatedTime(CEXIIPL::GC_EPOCH);
+    u64 rand = Common::Timer::GetLocalTimeSinceJan1970() - CEXIIPL::GC_EPOCH;
     formatTime = Common::swap64(rand);
     for (int i = 0; i < 12; i++)
     {