Update libsrtp to 1.5.2

srtp/crypto/include/sha1.h

 /*
  * sha1.h
  *
  * interface to the Secure Hash Algorithm v.1 (SHA-1), specified in
  * FIPS 180-1
  *
  * David A. McGrew
  * Cisco Systems, Inc.
  */
 
@@ skipping 29 matching lines @@
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
 
 #ifndef SHA1_H
 #define SHA1_H
 
+#ifdef HAVE_CONFIG_H
+    #include <config.h>
+#endif
+
 #include "err.h"
 #ifdef OPENSSL
 #include <openssl/evp.h>
 #include <stdint.h>
 
 typedef EVP_MD_CTX sha1_ctx_t;
 
 /*
  * sha1_init(&ctx) initializes the SHA1 context ctx
  *
@@ skipping 79 matching lines @@
  *  this function does not do any of the padding required in the
  *  complete sha1 function
  */
 
 void
 sha1_core(const uint32_t M[16], uint32_t hash_value[5]);
 
 #endif /* else OPENSSL */
      
 #endif /* SHA1_H */