gdb: rename target-delegates.c to target-delegates-gen.c

Following this suggestion:

https://inbox.sourceware.org/gdb-patches/2a0520ec-ccfe-4fc3-b051-7b8c60294de5@efficios.com/T/#md537792a1871addf153f3e406224f9baf025414a

Change-Id: I30988c46505f130ca16155891958f92621cada97
Approved-By: John Baldwin <jhb@FreeBSD.org>
Approved-By: Andrew Burgess <aburgess@redhat.com>

gdb/make-target-delegates.py

@@ -362,7 +362,7 @@ for current_line in scan_target_h():
 
     delegators.append(name)
 
-with open("target-delegates.c", "w") as f:
+with open("target-delegates-gen.c", "w") as f:
     print(
         gdbcopyright.copyright(
             "make-target-delegates.py", "Boilerplate target methods for GDB"

gdb/target-debug.h

@@ -26,7 +26,7 @@
    behavior is needed.
 
    References to these printers are automatically generated by
-   make-target-delegates.  See the generated file target-delegates.c.
+   make-target-delegates.  See the generated file target-delegates-gen.c.
 
    In a couple cases, a special printing function is defined and then
    used via the TARGET_DEBUG_PRINTER macro.  See target.h.
@@ -46,8 +46,8 @@
 #include "target/waitstatus.h"
 
 /* The functions defined in this header file are not marked "inline", such
-   that any function not used by target-delegates.c (the only user of this file)
-   will be flagged as unused.  */
+   that any function not used by target-delegates-gen.c (the only user of this
+   file) will be flagged as unused.  */
 
 static std::string
 target_debug_print_target_object (target_object object)

gdb/target.c

@@ -3698,7 +3698,7 @@ dummy_make_corefile_notes (struct target_ops *self,
   return NULL;
 }
 
-#include "target-delegates.c"
+#include "target-delegates-gen.c"
 
 /* The initial current target, so that there is always a semi-valid
    current target.  */