Fix build error for openssl.

Change-Id: I92b3d941f28b9c7f8470b6ae82a1693f4a95967a
diff --git a/mbtk/libmbtk_lib/net/mbtk_openssl.c b/mbtk/libmbtk_lib/net/mbtk_openssl.c
index ba1d932..2272080 100755
--- a/mbtk/libmbtk_lib/net/mbtk_openssl.c
+++ b/mbtk/libmbtk_lib/net/mbtk_openssl.c
@@ -34,7 +34,7 @@
 

 #define MBTK_SSL_INFO_FD_DEFAULT -1

 

-X509 * SSL_get1_peer_certificate(SSL *ssl);

+// X509 * SSL_get1_peer_certificate(SSL *ssl);

 

 static mbtk_openssl_result_e mbtk_openssl_wait_for_socket(int sockfd, bool is_read)

 {