tests: Update base64 OOM test cases to match implementation changes

Introduction of the new base64 helper function changed the backtraces
for these OOM test cases and resulted in test failures. Update the test
scripts to work with the new implementation.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/utils/base64.c

@@ -165,7 +165,7 @@ static unsigned char * base64_gen_decode(const unsigned char *src, size_t len,
 unsigned char * base64_encode(const unsigned char *src, size_t len,
 			      size_t *out_len)
 {
-	return base64_gen_encode(src, len, out_len, base64_table, 0);
+	return base64_gen_encode(src, len, out_len, base64_table, 1);
 }