archiso/initcpio/hooks/archiso: remove option terminator from the blockdev command

Apparently blockdev does not support it.

In an ISO made using -s img (Squashfs with dm-snapshot), it results in:

blockdev: Unknown command: --

The ISO still successfully boots and runs.

changed the description

mentioned in merge request !40 (merged)

approved this merge request

changed milestone to %v47

added scopebug label

added 2 commits

• 6312ccc9 - 1 commit from branch archlinux:master
• 8e82bbbe - archiso/initcpio/hooks/archiso: remove option terminator from the blockdev command

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merged