i'd like to think Gentoo has grown up now to the point where we don't bother 
with trivial ricer behavior.  to that end, i'd like to EOL `filter-mfpmath`.

my main beef with filtering -mfpmath is that we use this only when someone 
actually notices and reports misbehavior with the package in question, the 
behavior can fluctuate between gcc versions, and it's questionable whether the 
flag makes a significant difference in performance.  considering this is x86-
only, and our main user base is amd64 based, it doesn't see nearly the amount 
of attention that it did in the past.  i'd prefer we leave this flag to the 
respective upstream packages to validate when it should be used (i.e. the 
mplayer's and ffmpeg's and such in the world).

Ryan did a check and it seems we've got all of 5 packages (and one eclass) 
using this.  so i say it's time to scrub the tree, punt the func, and then 
punt people who attempt to report bugs when building their whole system with -
mfpmath and see misbehavior.
-mike