sci-libs/fplll: Remove in favour of newer version in gx86.

fplll 2.1.6 is not available at SRC_URI, and 4.0.4 is in gx86.

Signed-off-by: James Cloos <cloos@jhcloos.com>
Merge pull request #92 from jhcloos/fplll

sci-libs/fplll: Remove in favour of newer version in gx86.