Avoid using '#' format spec for X hex numbers.

Avoid using '#' format spec for X (uppercase) hex numbers, as it
results in output like "0XABCDEF" instead of "0xABCDEF".

src/xenia/kernel/xboxkrnl/xboxkrnl_debug.cc

@@ -136,8 +136,8 @@ DECLARE_XBOXKRNL_EXPORT2(RtlRaiseException, kDebug, kStub, kImportant);
 
 void KeBugCheckEx(dword_t code, dword_t param1, dword_t param2, dword_t param3,
                   dword_t param4) {
-  XELOGD("*** STOP: {:#08X} ({:#08X}, {:#08X}, {:#08X}, {:#08X})", code, param1,
-         param2, param3, param4);
+  XELOGD("*** STOP: 0x{:08X} (0x{:08X}, 0x{:08X}, 0x{:08X}, 0x{:08X})", code,
+         param1, param2, param3, param4);
   fflush(stdout);
   xe::debugging::Break();
   assert_always();