crypt: export mz_crypt_pbkdf2 unconditionally

Let users use the function if they implement `mz_crypt_hmac_*` API
without using CommonCrypto or OpenSSL.

Author: sergio-nsk

mz_crypt.c

@@ -91,7 +91,7 @@ uint32_t mz_crypt_crc32_update(uint32_t value, const uint8_t *buf, int32_t size)
 #endif
 }
 
-#if defined(HAVE_WZAES)
+#if defined(MZ_ZIP_NO_CRYPTO)
 int32_t mz_crypt_pbkdf2(const uint8_t *password, int32_t password_length, const uint8_t *salt, int32_t salt_length,
                         uint32_t iteration_count, uint8_t *key, uint16_t key_length) {
     void *hmac1 = NULL;

test/test_crypt.cc

@@ -436,7 +436,6 @@ TEST(crypt, hmac_sha256) {
 #  endif
 }
 
-#  ifdef HAVE_WZAES
 TEST(crypt, pbkdf2) {
     uint16_t iteration_count = 1000;
     uint8_t key[MZ_HASH_SHA1_SIZE];
@@ -570,5 +569,4 @@ TEST(crypt, pbkdf2_rfc6070_v5) {
 
     EXPECT_STREQ(key_hex, "56fa6aa75548099dcc37d7f03425e0c3");
 }
-#  endif
 #endif