parasite: Remove typedef-ed type from parasite header

I'll include it into a place, that knows nothing about
pb types. Use generic pointer instead.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/parasite-syscall.h

@@ -30,7 +30,8 @@ extern int parasite_dump_itimers_seized(struct parasite_ctl *ctl, struct cr_fdse
 
 struct parasite_dump_misc;
 extern int parasite_dump_misc_seized(struct parasite_ctl *ctl, struct parasite_dump_misc *misc);
-extern int parasite_dump_creds(struct parasite_ctl *ctl, CredsEntry *ce);
+struct _CredsEntry;
+extern int parasite_dump_creds(struct parasite_ctl *ctl, struct _CredsEntry *ce);
 extern int parasite_dump_pages_seized(struct parasite_ctl *ctl,
 				      struct list_head *vma_area_list,
 				      struct cr_fdset *cr_fdset);