Guard sys/auxv.h include on !BORINGSSL_ANDROID.

Some versions of Android libc don't even include the header.

Change-Id: Ib1033d2b8a10ba69d834ac1ed2564870e0e35d61
Reviewed-on: https://boringssl-review.googlesource.com/c/32664
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

crypto/fipsmodule/rand/urandom.c

diff --git a/crypto/fipsmodule/rand/urandom.c b/crypto/fipsmodule/rand/urandom.c
index 777920e..c3b0e66 100644
--- a/crypto/fipsmodule/rand/urandom.c
+++ b/crypto/fipsmodule/rand/urandom.c
@@ -33,7 +33,9 @@
 #include <linux/random.h>
 #include <sys/ioctl.h>
 #endif
+#if !defined(OPENSSL_ANDROID)
 #include <sys/auxv.h>
+#endif
 #include <sys/syscall.h>
 #endif