[dev.boringcrypto] crypto/tls: use correct config in TestBoringClientHello

The existing implementation sets the ClientConfig to specific values to
check, but does not uses it in the actual testing. This commit make the
test to actually use it, which can be used to flag bugs in the future.

Change-Id: I8d883c11675169705771af3fcca11a303cfeb30f
GitHub-Last-Rev: 37841fd3561c95c8c9143c9fa4fff81268e18cdc
GitHub-Pull-Request: golang/go#47959
Reviewed-on: https://go-review.googlesource.com/c/go/+/345029
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/src/crypto/tls/boring_test.go b/src/crypto/tls/boring_test.go
index 6ad72fa..8dd477a 100644
--- a/src/crypto/tls/boring_test.go
+++ b/src/crypto/tls/boring_test.go
@@ -264,7 +264,7 @@
 	clientConfig.CipherSuites = allCipherSuites()
 	clientConfig.CurvePreferences = defaultCurvePreferences
 
-	go Client(c, testConfig).Handshake()
+	go Client(c, clientConfig).Handshake()
 	srv := Server(s, testConfig)
 	msg, err := srv.readHandshake()
 	if err != nil {