Get struct timeval from sys/time.h.

The naclports patch switches sys/types.h to sys/time.h. Per
http://pubs.opengroup.org/onlinepubs/009604499/basedefs/sys/time.h.html
this is correct.

Change-Id: If6d56cb28fa16a1d8b4515a45532434f6c23a29d
Reviewed-on: https://boringssl-review.googlesource.com/6624
Reviewed-by: Adam Langley <agl@google.com>

ssl/internal.h

@@ -155,7 +155,7 @@
 #include <winsock2.h>
 #pragma warning(pop)
 #else
-#include <sys/types.h>
+#include <sys/time.h>
 #endif
 
 

ssl/test/bssl_shim.cc

@@ -20,7 +20,7 @@
 #include <netinet/tcp.h>
 #include <signal.h>
 #include <sys/socket.h>
-#include <sys/types.h>
+#include <sys/time.h>
 #include <unistd.h>
 #else
 #include <io.h>
@@ -33,7 +33,6 @@
 #endif
 
 #include <string.h>
-#include <sys/types.h>
 
 #include <openssl/bio.h>
 #include <openssl/buf.h>