Add a couple more missing includes

Change-Id: I1aa9c3431a7de2ce67e124a99e7a87dbbf50834f
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/79627
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>

crypto/pkcs8/p5_pbev2.cc

@@ -19,6 +19,7 @@
 
 #include <openssl/bytestring.h>
 #include <openssl/cipher.h>
+#include <openssl/digest.h>
 #include <openssl/err.h>
 #include <openssl/mem.h>
 #include <openssl/nid.h>

crypto/pkcs8/pkcs8_x509.cc

@@ -26,6 +26,7 @@
 #include <openssl/evp.h>
 #include <openssl/hmac.h>
 #include <openssl/mem.h>
+#include <openssl/nid.h>
 #include <openssl/rand.h>
 #include <openssl/x509.h>