Merge pull request #88 from LedgerHQ/develop #426

Job	Run time
Unit test	1m 31s
Build application / Retrieve application metadata / Retrieve application metadata	5s
Build application / Build application for NanoS, X, S+, and Stax (stax)	42s
Build application / Build application for NanoS, X, S+, and Stax (flex)	48s
Build application / Build application for NanoS, X, S+, and Stax (nanox)	42s
Build application / Build application for NanoS, X, S+, and Stax (nanos)	37s
Build application / Build application for NanoS, X, S+, and Stax (nanosp)	34s
Build application / Merge build artifacts	2s
Stellar e2e tests (nanos)	17m 53s
Stellar e2e tests (nanox)	12m 32s
Stellar e2e tests (nanosp)	13m 55s
Stellar e2e tests (stax)	9m 23s
Stellar e2e tests (flex)	10m 26s
	1h 9m 10s

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