Annotate all data with DUSK_GAME_DATA (#2214)

The hope of auto-importing data via lld MinGW
+ pseudo_reloc is now dead thanks to ARM64,
so I just wrote a script to go annotate every
exported data symbol in the game instead.

src/d/d_msg_unit.cpp

@@ -379,4 +379,4 @@ void dMsgUnit_c::setTag(int i_type, int i_value, TEXT_SPAN o_buffer, bool param_
 }
 #endif
 
-dMsgUnit_c g_msg_unit;
+DUSK_GAME_DATA dMsgUnit_c g_msg_unit;