optee_examples_ext.mk, optee_test_ext.mk: use host-python3-pycryptodomex

The optee_examples_ext and optee_test_ext packages are currently using
the python3 command found in $PATH. It is more correct to use the
Buildroot one.

Signed-off-by: Jerome Forissier <jerome@forissier.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

br-ext/package/optee_examples_ext/optee_examples_ext.mk

@@ -12,6 +12,7 @@ define OPTEE_EXAMPLES_EXT_BUILD_TAS
 		echo Building $f && \
 			$(MAKE) CROSS_COMPILE="$(shell echo $(BR2_PACKAGE_OPTEE_EXAMPLES_EXT_CROSS_COMPILE))" \
 			O=out TA_DEV_KIT_DIR=$(OPTEE_EXAMPLES_EXT_SDK) \
+			PYTHON3=$(HOST_DIR)/bin/python3 \
 			$(TARGET_CONFIGURE_OPTS) -C $(dir $f) all &&) true
 endef
 

br-ext/package/optee_test_ext/optee_test_ext.mk

@@ -15,6 +15,7 @@ define OPTEE_TEST_EXT_BUILD_TAS
 		echo Building $f && \
 			$(MAKE) CROSS_COMPILE="$(shell echo $(BR2_PACKAGE_OPTEE_TEST_EXT_CROSS_COMPILE))" \
 			O=out TA_DEV_KIT_DIR=$(OPTEE_TEST_EXT_SDK) \
+			PYTHON3=$(HOST_DIR)/bin/python3 \
 			$(TARGET_CONFIGURE_OPTS) -C $(dir $f) all &&) true
 endef