This has long since been deprecated and is no longer used anywhere, FILESPATH
is the commonly used varaible which offers much more flexibility. Remove
the FILESDIR code and references from bitbake.
(Bitbake rev: 751c9dc51fd01fa64a1ff37ba2638110335f71af)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>