If we are multiblock capable make sure we use it

Recent changes to the assembler defines meant that they weren't being
set for libssl code. This resulted in the multiblock code never being
used.

Fixes #9571

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9574)

ssl/build.info

@@ -1,4 +1,15 @@
 LIBS=../libssl
+
+#Needed for the multiblock code in rec_layer_s3.c
+IF[{- !$disabled{asm} -}]
+  $AESDEF_x86=AES_ASM
+  $AESDEF_x86_64=AES_ASM
+
+  IF[$AESDEF_{- $target{asm_arch} -}]
+    $AESDEF=$AESDEF_{- $target{asm_arch} -}
+  ENDIF
+ENDIF
+
 #TODO: For now we just include the libcrypto packet.c in libssl as well. We
 #      could either continue to do it like this, or export all the WPACKET
 #      symbols so that libssl can use them like any other. Probably would do
@@ -17,3 +28,4 @@ SOURCE[../libssl]=\
         bio_ssl.c ssl_err.c tls_srp.c t1_trce.c ssl_utst.c \
         record/ssl3_buffer.c record/ssl3_record.c record/dtls1_bitmap.c \
         statem/statem.c record/ssl3_record_tls13.c
+DEFINE[../libssl]=$AESDEF