Fix sysroot fallback #574

Job	Run time
Build SDK (nanos)	2m 19s
Run static analysis (nanos, include_gif)	1m 24s
Build SDK (nanox)	2m 26s
Build SDK	1m 41s
Run static analysis (nanos, testmacro)	1m 22s
Build SDK (nanosplus)	2m 19s
Run static analysis for cargo-ledger	1m 34s
Run static analysis (nanos, ledger_secure_sdk_sys)	1m 48s
Build SDK (stax)	2m 25s
Run static analysis (nanos, ledger_device_sdk)	2m 21s
Build SDK (flex)	2m 30s
Check code formatting	1m 16s
Run static analysis (nanox, include_gif)	1m 26s
Run unit and integration tests (nanos)	2m 34s
Run static analysis (nanox, testmacro)	1m 18s
Run unit and integration tests (nanox)	2m 34s
Run static analysis (nanox, ledger_secure_sdk_sys)	1m 56s
Run unit and integration tests (nanosplus)	2m 46s
Run static analysis (nanox, ledger_device_sdk)	2m 26s
Run unit and integration tests (stax)	2m 38s
Run static analysis (nanosplus, include_gif)	1m 27s
Run unit and integration tests (flex)	2m 38s
Run static analysis (nanosplus, testmacro)	1m 20s
Run static analysis (nanosplus, ledger_secure_sdk_sys)	1m 56s
Run static analysis (nanosplus, ledger_device_sdk)	2m 19s
Run static analysis (stax, include_gif)	1m 26s
Run static analysis (stax, testmacro)	1m 23s
Run static analysis (stax, ledger_secure_sdk_sys)	2m 4s
Run static analysis (stax, ledger_device_sdk)	2m 23s
Run static analysis (flex, include_gif)	1m 27s
Run static analysis (flex, testmacro)	1m 19s
Run static analysis (flex, ledger_secure_sdk_sys)	2m 2s
Run static analysis (flex, ledger_device_sdk)	2m 25s
	1h 5m 12s

Provide feedback