Start decompiling xHud (#299)

* Start decompiling xHud

* Decompile xHudText, equivalent

* xHud: Update some block_allocator member names

* xHud: Add some missing virtual declarations

xHudText is actually equivalent now.

* Decompile some more xHud functions

configure.py

@@ -299,7 +299,7 @@ def Rel(lib_name: str, objects: List[Object]) -> Dict[str, Any]:
             Object(NonMatching, "SB/Core/x/xFX.cpp"),
             Object(Matching, "SB/Core/x/xGroup.cpp"),
             Object(Matching, "SB/Core/x/xhipio.cpp"),
-            Object(NonMatching, "SB/Core/x/xHud.cpp"),
+            Object(NonMatching, "SB/Core/x/xHud.cpp", extra_cflags=["-sym on"]),
             Object(NonMatching, "SB/Core/x/xHudFontMeter.cpp"),
             Object(NonMatching, "SB/Core/x/xHudMeter.cpp"),
             Object(NonMatching, "SB/Core/x/xHudModel.cpp"),
@@ -497,7 +497,7 @@ def Rel(lib_name: str, objects: List[Object]) -> Dict[str, Any]:
             Object(NonMatching, "SB/Game/zNPCHazard.cpp"),
             Object(NonMatching, "SB/Game/zNPCGoalAmbient.cpp"),
             Object(NonMatching, "SB/Game/zNPCFXCinematic.cpp"),
-            Object(NonMatching, "SB/Core/x/xHudText.cpp"),
+            Object(Equivalent, "SB/Core/x/xHudText.cpp", extra_cflags=["-sym on"]),
             Object(NonMatching, "SB/Game/zCombo.cpp"),
             Object(NonMatching, "SB/Core/x/xCM.cpp"),
         ],