Addressing comments.

src/core/security/security_context.c

@@ -63,8 +63,8 @@ static const char *installed_roots_path = INSTALL_PREFIX "/share/grpc/roots.pem"
 /* Defines the cipher suites that we accept by default. All these cipher suites
    are compliant with HTTP2. */
 #define GRPC_SSL_CIPHER_SUITES                                            \
-  "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:AES128-GCM-SHA256:" \
+  "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-" \
-  "AES256-GCM-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384"
+  "SHA384:ECDHE-RSA-AES256-GCM-SHA384"
 
 static gpr_once cipher_suites_once = GPR_ONCE_INIT;
 static const char *cipher_suites = NULL;