www/elinks: fix build with CSS option on

• add upstream patch to support libcss 0.9.2 and libdom 0.4.2
• appease stage-qa and add libwapcaplet to LIB_DEPENDS
• also address some LIB_DEPENDS needed or no longer needed (also found by stage-qa):
  • libintl.so is not directly used by elinks, so change USES=gettext to USES=gettext-runtime:build
  • nspr is no longer needed by elinks in 0.17.0 (or perhaps earlier)
  • libxml++ is no longer needed by elinks in 0.17.0 (or perhaps earlier)
  • libmozjs should have been a LIB_DEPENDS item (with SPIDERMONKEY on) - add it
• gettext-tools is also needed (only a build time dependency by default) as msgfmt is invoked during the build.
• option SPIDERMONKEY now depends on option CSS

PR: 281215
MFH: 2024Q3
Approved by: jailbird@fdf.net (maintainer)

(cherry picked from commit 29a794c2b8900c8a650dc67e8b138d4e9e470a24)