Update iscan to 2.30.4
The tarball iscan_2.30.3-1.tar.gz is deleted from source and it was replaced with iscan_2.30.4-2.tar.gz.
The only change is the License update.
Depends on D8839
Signed-off-by: Algent Albrahimi <firstname.lastname@example.org>
Test Plan: Rebuild against new version of sane-backends.
Reviewers: Triage Team, DataDrake
Reviewed By: Triage Team, DataDrake
Differential Revision: https://dev.getsol.us/D8843