Add UEFI flag for rand build

Add OPENSSL_SYS_UEFI flag for RAND handling;
Signed-off-by: NRich Salz <rsalz@akamai.com>
Reviewed-by: NTim Hudson <tjh@openssl.org>

crypto/rand/rand_unix.c

@@ -116,7 +116,7 @@
 #include <openssl/rand.h>
 #include "rand_lcl.h"
 
-#if !(defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE))
+#if !(defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE) || defined(OPENSSL_SYS_UEFI))
 
 # include <sys/types.h>
 # include <sys/time.h>
@@ -419,7 +419,7 @@ int RAND_poll(void)
                                  * defined(OPENSSL_SYS_VXWORKS) ||
                                  * defined(OPENSSL_SYS_NETWARE)) */
 
-#if defined(OPENSSL_SYS_VXWORKS)
+#if defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_UEFI)
 int RAND_poll(void)
 {
     return 0;