Fix conflicting types true/false

[dlegaultbbry]

Problem Description

Compiling on some platforms can result in this problem because true/false are already defined elsewhere (and C23 promotes them to keywords now):

pkcs11-tool.c: In function 'derive_ec_key':
pkcs11-tool.c:4690:18: error: expected identifier or '(' before numeric constant
 4690 |         CK_BBOOL true = TRUE;
      |                  ^~~~
pkcs11-tool.c:4691:18: error: expected identifier or '(' before numeric constant
 4691 |         CK_BBOOL false = FALSE;
      |                  ^~~~~
pkcs11-tool.c:4694:29: error: lvalue required as unary '&' operand
 4694 |                 {CKA_TOKEN, &false, sizeof(false)}, /* session only object */
      |                             ^
pkcs11-tool.c:4697:33: error: lvalue required as unary '&' operand
 4697 |                 {CKA_SENSITIVE, &false, sizeof(false)},
      |                                 ^
pkcs11-tool.c:4698:35: error: lvalue required as unary '&' operand
 4698 |                 {CKA_EXTRACTABLE, &true, sizeof(true)},
      |                                   ^
pkcs11-tool.c:4699:31: error: lvalue required as unary '&' operand
 4699 |                 {CKA_ENCRYPT, &true, sizeof(true)},
      |                               ^
pkcs11-tool.c:4700:31: error: lvalue required as unary '&' operand
 4700 |                 {CKA_DECRYPT, &true, sizeof(true)},
      |                               ^
pkcs11-tool.c:4701:28: error: lvalue required as unary '&' operand
 4701 |                 {CKA_WRAP, &true, sizeof(true)},
      |                            ^
pkcs11-tool.c:4702:30: error: lvalue required as unary '&' operand
 4702 |                 {CKA_UNWRAP, &true, sizeof(true)}
      |                              ^

Proposed Resolution

Just do as the rest of the code and use _true/_false instead

Steps to reproduce

Logs

Will post a PR to fix this.