girepository: Add missing includes of corresponding headers

Make sure that each C file in `girepository/` includes its corresponding
header file (if such a file exists).

This ensures that the first declaration the compiler sees for each
function contains the symbol visibility macros. This fixes symbol export
(`dllexport`) on Windows platforms.

Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>

Helps: #3155

girepository/gicallableinfo.c

@@ -32,6 +32,7 @@
 #include "girepository-private.h"
 #include "gitypelib-internal.h"
 #include "girffi.h"
+#include "gicallableinfo.h"
 
 /* GICallableInfo functions */