Turn off clang-format in embed_test_data.go output.

Chromium's tooling is unhappy.

Change-Id: Iefa70ceca5b62cc65f19ee46a33068139b79b3fc
Reviewed-on: https://boringssl-review.googlesource.com/16624
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

util/embed_test_data.go

diff --git a/util/embed_test_data.go b/util/embed_test_data.go
index 0819530..cb7cc2e 100644
--- a/util/embed_test_data.go
+++ b/util/embed_test_data.go
@@ -81,6 +81,8 @@
 	fmt.Printf(" */\n")
 
 	fmt.Printf(`
+/* clang-format off */
+
 #include <stdlib.h>
 #include <string.h>