iOS - Variants setup should make use of APP_NAME to specify TEST_HOST

[arthurpalves]

What

When running variants setup, the Xcode project is modified. During this modification, the app name is changed to reflect the values from variants.yml, however the TEST_HOST is unchanged and references the default variant only.

What to do

Make sure the TEST_HOST value is changed, from:

TEST_HOST = "$(BUILT_PRODUCTS_DIR)/App Name.app/App Name";

To:

TEST_HOST = "$(BUILT_PRODUCTS_DIR)/$(V_APP_NAME).app/$(V_APP_NAME)";