Convert ed25519_test to GTest.

BUG=129

Change-Id: I784a745f102d9d09d35b27542d94b2b85dfb332e
Reviewed-on: https://boringssl-review.googlesource.com/16508
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/sources.cmake b/sources.cmake
index 185e961..4de0d07 100644
--- a/sources.cmake
+++ b/sources.cmake
@@ -6,5 +6,6 @@
 set(
   CRYPTO_TEST_DATA
 
+  crypto/curve25519/ed25519_tests.txt
   crypto/fipsmodule/aes/aes_tests.txt
 )