Register the *25519 tests as dependencies of all_tests.

This ensures the run_tests target updates those binaries.

Change-Id: I32b68026da4852424b5621e014e71037c8a5754c
Reviewed-on: https://boringssl-review.googlesource.com/6513
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/crypto/curve25519/CMakeLists.txt b/crypto/curve25519/CMakeLists.txt
index 6abba92..ac397d0 100644
--- a/crypto/curve25519/CMakeLists.txt
+++ b/crypto/curve25519/CMakeLists.txt
@@ -26,6 +26,7 @@
 )
 
 target_link_libraries(ed25519_test crypto)
+add_dependencies(all_tests ed25519_test)
 
 add_executable(
   x25519_test
@@ -34,3 +35,4 @@
 )
 
 target_link_libraries(x25519_test crypto)
+add_dependencies(all_tests x25519_test)