ci(coverity): fix badly-parsed `--jobs` argument

Because there's no longer whitespace between `--jobs` and its sanitised
value, the shell interprets the quotes as part of the argument.

Instead, just use `-j`.

Change-Id: I1d0d5f4a5993f333ffb96aab48189615305e66b5
Signed-off-by: Chris Kay <chris.kay@arm.com>
1 file changed