tests: do not check internal firmware.corp certificate

To be discussed with adminkos whether this is correct or not.

tests/download_emulators.sh

@@ -5,7 +5,7 @@ SITE="https://firmware.corp.sldev.cz/upgrade_tests/"
 cd "$(dirname "$0")"
 
 # download all emulators without index files, without directories and only if not present
-wget -e robots=off --no-verbose --no-clobber --no-parent --cut-dirs=2 --no-host-directories --recursive --reject "index.html*" -P emulators/ $SITE
+wget --no-check-certificate -e robots=off --no-verbose --no-clobber --no-parent --cut-dirs=2 --no-host-directories --recursive --reject "index.html*" -P emulators/ $SITE
 
 chmod u+x emulators/trezor-emu-*