Fixes for delinking

Fixes delink failures in Action.obj and ActSequence.obj.

Some missing data types have been added to each corresponding header
file, and entries have been added to the symbol table to fix errors from
undefined types.  The mangling script has also been amended to handle
method pointers as they're currently imported into Ghidra (which are
missing the calling convention, and likely behind a typedef).

ghidra/make_header.sh

@@ -1,5 +1,5 @@
 #!/bin/sh -eu
-# Merges all header files in the decompilation into  a C header file called
+# Merges all header files in the decompilation into a C header file called
 # jsrf.h for importing into Ghidra
 
 # Create output file