Flush the error log before exit (ryubing/ryujinx!163)

See merge request ryubing/ryujinx!163

src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs

@@ -1095,6 +1095,8 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
 
             Logger.Error?.Print(LogClass.Cpu, $"Invalid memory access at virtual address 0x{va:X16}.");
 
+            Logger.Flush();
+
             return false;
         }
 
@@ -1103,6 +1105,8 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
             KernelStatic.GetCurrentThread().PrintGuestStackTrace();
             KernelStatic.GetCurrentThread()?.PrintGuestRegisterPrintout();
 
+            Logger.Flush();
+
             throw new UndefinedInstructionException(address, opCode);
         }