base: s/addkv_{bool,number,object}/setkv

Now heim_audit_addkv() correctly supports multiple values, the other functions
that (by design) replace existing values with a single value should use the
heim_audit_setkv prefix.

A subsequent commit could add variants that support multiple values for
non-string types.

kdc/version-script.map

@@ -21,9 +21,9 @@ HEIMDAL_KDC_1.0 {
 		krb5_kdc_update_time;
 		krb5_kdc_pk_initialize;
 		_kdc_audit_addkv;
-		_kdc_audit_addkv_bool;
-		_kdc_audit_addkv_number;
-		_kdc_audit_addkv_object;
+		_kdc_audit_setkv_bool;
+		_kdc_audit_setkv_number;
+		_kdc_audit_setkv_object;
 		_kdc_audit_getkv;
 		_kdc_audit_addreason;
 		_kdc_audit_vaddkv;