Group configure options by the functionality category they roughly
belong to

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

Supersedes openwrt/packages#8571

Reported-by: Rosen Penev rosenp@gmail.com
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

Here are the notable changes

 - pixman is now not part of the release tarball and is required as an
   external dependency
 - archipelago is removed by upstream
 - patches are regenerated with git-format-patch
 - ifunc requirement is now removed

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>