Merge pull request #3255 from ctiller/we-should-build

Fix compilation
diff --git a/test/core/security/secure_endpoint_test.c b/test/core/security/secure_endpoint_test.c
index af4b708..047d377 100644
--- a/test/core/security/secure_endpoint_test.c
+++ b/test/core/security/secure_endpoint_test.c
@@ -39,6 +39,7 @@
 #include "src/core/security/secure_endpoint.h"
 #include "src/core/iomgr/endpoint_pair.h"
 #include "src/core/iomgr/iomgr.h"
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include "test/core/util/test_config.h"