Add copy of header file for libtestdriver1

Signed-off-by: Ben Taylor <ben.taylor@linaro.org>
diff --git a/tests/Makefile b/tests/Makefile
index 3a6f0e6..094c039 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -332,6 +332,7 @@
 	mkdir ./libtestdriver1/tf-psa-crypto/drivers
 	mkdir ./libtestdriver1/tf-psa-crypto/drivers/everest
 	mkdir ./libtestdriver1/tf-psa-crypto/drivers/p256-m
+#	mkdir -p ./libtestdriver1/tf-psa-crypto/drivers/builtin/include/mbedtls/private/
 	touch ./libtestdriver1/tf-psa-crypto/drivers/everest/Makefile.inc
 	touch ./libtestdriver1/tf-psa-crypto/drivers/p256-m/Makefile.inc
 	cp -Rf ../framework/scripts ./libtestdriver1/framework
@@ -342,6 +343,8 @@
 	cp -Rf ../tf-psa-crypto/include ./libtestdriver1/tf-psa-crypto
 	cp -Rf ../tf-psa-crypto/drivers/builtin ./libtestdriver1/tf-psa-crypto/drivers
 	cp -Rf ../tf-psa-crypto/scripts ./libtestdriver1/tf-psa-crypto
+	mkdir -p libtestdriver1/tf-psa-crypto/drivers/builtin/include/mbedtls/private/
+	cp -r libtestdriver1/tf-psa-crypto/include/mbedtls/private/pk_private.h libtestdriver1/tf-psa-crypto/drivers/builtin/include/mbedtls/private/pk_private.h
 
 	# Set the test driver base (minimal) configuration.
 	cp ../tf-psa-crypto/tests/configs/config_test_driver.h ./libtestdriver1/include/mbedtls/mbedtls_config.h