Windows: On unimplemented print a log

Makes it easier to find which one was missing. Can't use regular log
routines in the header due to conflicting win32 defines.

Source/Windows/Common/Logging.cpp

@@ -32,6 +32,12 @@ static void AssertHandler(const char* Message) {
 }
 } // namespace
 
+
+namespace FEX::Windows::Logging {
+void UnimplementedLog(const char* Func) {
+  LogMan::Msg::DFmt("Unimplemented Function in: {}", Func);
+}
+} // namespace FEX::Windows::Logging
 namespace FEX::Windows::Logging {
 void Init() {
   FEX_CONFIG_OPT(SilentLog, SILENTLOG);

Source/Windows/Common/Priv.h

@@ -55,11 +55,15 @@ public:
   }
 };
 
+namespace FEX::Windows::Logging {
+void UnimplementedLog(const char* Func);
+}
 
-#define UNIMPLEMENTED()                        \
-  do {                                         \
-    NtTerminateProcess(NtCurrentProcess(), 0); \
-    __fastfail(0);                             \
+#define UNIMPLEMENTED()                                \
+  do {                                                 \
+    FEX::Windows::Logging::UnimplementedLog(__func__); \
+    NtTerminateProcess(NtCurrentProcess(), 0);         \
+    __fastfail(0);                                     \
   } while (0)
 
 #define DLLEXPORT_FUNC(Ret, Name, Args) \