build issue do to openssl 1.0.1g upgrade

BIO *BIO_new_mem_buf(void *, int);
      ^
In file included from /home/jenkins/oe/world/shr-core/tmp-glibc/sysroots/qemuarm/usr/include/openssl/asn1.h:65:0,
from build/temp.linux-x86_64-2.7/_openssl.c:413:


Upstream-Status: Pending

seems to be a known issue
https://github.com/pyca/cryptography/issues/2750

Signed-off-by: Armin Kuster <akuster@mvista.com>

Index: src/_cffi_src/openssl/bio.py
===================================================================
--- a/src/_cffi_src/openssl/bio.py
+++ b/src/_cffi_src/openssl/bio.py
@@ -99,7 +99,7 @@ BIO *BIO_pop(BIO *);
 BIO *BIO_next(BIO *);
 BIO *BIO_find_type(BIO *, int);
 BIO_METHOD *BIO_s_mem(void);
-BIO *BIO_new_mem_buf(void *, int);
+BIO *BIO_new_mem_buf(const void *, int);
 BIO_METHOD *BIO_s_file(void);
 BIO *BIO_new_file(const char *, const char *);
 BIO *BIO_new_fp(FILE *, int);