installer/portable: exclude `sshd` #392

Job	Run time
determine-packages	5s
check-for-missing-dlls (32)	4m 30s
check-for-missing-dlls (64)	5m 18s
build-packages	0s
build-artifacts (portable)	3m 46s
sdk-artifacts (minimal, 64)	33s
sdk-artifacts (makepkg-git, 64)	59s
sdk-artifacts (build-installers, 32)	3m 54s
sdk-artifacts (build-installers, 64)	6m 15s
sdk-artifacts (full, 32)	1m 36s
sdk-artifacts (full, 64)	2m 0s
	28m 56s

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