Use relative include paths for OpenSSL and zlib in QUICHE.

We use those in Envoy, and those should also work in Chromium (otherwise third-party libraries depending on those would fail to compile).

PiperOrigin-RevId: 440992054

quiche/quic/core/tls_server_handshaker.h

diff --git a/quiche/quic/core/tls_server_handshaker.h b/quiche/quic/core/tls_server_handshaker.h
index fc2e9c4..9d005ed 100644
--- a/quiche/quic/core/tls_server_handshaker.h
+++ b/quiche/quic/core/tls_server_handshaker.h
@@ -8,8 +8,8 @@
 #include <string>
 
 #include "absl/strings/string_view.h"
-#include "third_party/boringssl/src/include/openssl/pool.h"
-#include "third_party/boringssl/src/include/openssl/ssl.h"
+#include "openssl/pool.h"
+#include "openssl/ssl.h"
 #include "quiche/quic/core/crypto/quic_crypto_server_config.h"
 #include "quiche/quic/core/crypto/tls_server_connection.h"
 #include "quiche/quic/core/proto/cached_network_parameters_proto.h"