www/elinks: Update to 0.19.0
Use gettext-runtime and localbase:ldflags.
Add TEST_TARGET and remove unneeded TEST_USES.
Add LD_FLAGS.
Pet portlint/portfmt.
Changelog: https://github.com/rkd77/elinks/releases/tag/v0.19.0
PR: 291966
Approved by: submitter is maintainer