Add missing include of sys/time.h

gettimeofday was undefined

Reviewed-by: Geoff Thorpe <geoff@openssl.org>
diff --git a/crypto/bio/bss_dgram.c b/crypto/bio/bss_dgram.c
index 88ee559..d45dd95 100644
--- a/crypto/bio/bss_dgram.c
+++ b/crypto/bio/bss_dgram.c
@@ -66,6 +66,9 @@
 #include <openssl/bio.h>
 #ifndef OPENSSL_NO_DGRAM
 
+#if !(defined(_WIN32) || defined(OPENSSL_SYS_VMS))
+# include <sys/time.h>
+#endif
 #if defined(OPENSSL_SYS_VMS)
 #include <sys/timeb.h>
 #endif