Fix fuzzer build.

Change-Id: Ice4e70b9b80a96c35877f1be5027ef0e7ad5513d
Reviewed-on: https://boringssl-review.googlesource.com/15504
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

crypto/rand_extra/CMakeLists.txt

@@ -5,6 +5,7 @@ add_library(
 
   OBJECT
 
+  deterministic.c
   forkunsafe.c
   fuchsia.c
   rand_extra.c