print/scribus: fix dependencies
- Fix GRAPHICSMAGICK_LIB_DEPENDS.
- Boost used for build only: replace BOOST_LIB_DEPENDS with BOOST_BUILD_DEPENDS.
- Fix path to icon.
Approved by: pkubaj (maintainer, via IRC)
MFH: 2024Q3
(cherry picked from commit 57a319e9532fd8e00016ebc72181139ce6aafaf4)