[mid-end] Fix declared type of personality functions

`build_personality_function` generates a declaration for a personality
function.  The type it declares for these functions doesn't match the
type of the actual personality functions that are defined by the C++
unwinding ABI.

This doesn't cause any crashes since the compiler never generates a call
to these decl's, and hence the type of the function is never used.
Nonetheless, for the sake of consistency and readability we update the
type of this declaration.

gcc/ChangeLog:

2019-11-05  Matthew Malcomson  <matthew.malcomson@arm.com>

	* expr.c (build_personality_function): Fix generated type to
	match actual personality functions.

From-SVN: r277846

gcc/ChangeLog

 2019-11-05  Matthew Malcomson  <matthew.malcomson@arm.com>
 
+	* expr.c (build_personality_function): Fix generated type to
+	match actual personality functions.
+
+2019-11-05  Matthew Malcomson  <matthew.malcomson@arm.com>
+
 	* config/aarch64/aarch64.c (aarch64_handle_attr_cpu): Allocate
 	enough bytes for the NULL character.
 

gcc/expr.c

@@ -12554,7 +12554,8 @@ build_personality_function (const char *lang)
 
   name = ACONCAT (("__", lang, "_personality", unwind_and_version, NULL));
 
-  type = build_function_type_list (integer_type_node, integer_type_node,
+  type = build_function_type_list (unsigned_type_node,
+				   integer_type_node, integer_type_node,
 				   long_long_unsigned_type_node,
 				   ptr_type_node, ptr_type_node, NULL_TREE);
   decl = build_decl (UNKNOWN_LOCATION, FUNCTION_DECL,