use <errno.h> instead of <sys/errno.h>

Change-Id: I05a3b0cb7ffaee90ed85d2cf795feded8fbad1df
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/62305
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
Auto-Submit: Bob Beck <bbe@google.com>

crypto/rand_extra/getentropy_test.cc

diff --git a/crypto/rand_extra/getentropy_test.cc b/crypto/rand_extra/getentropy_test.cc
index d691913..7f0c43a 100644
--- a/crypto/rand_extra/getentropy_test.cc
+++ b/crypto/rand_extra/getentropy_test.cc
@@ -24,7 +24,7 @@
 
 #include <unistd.h>
 
-#include <sys/errno.h>
+#include <errno.h>
 
 #if defined(OPENSSL_MACOS) || defined(OPENSSL_FUCHSIA)
 #include <sys/random.h>