Simplify clean list and add libtest build files.
Simplify clean list and add libtest build files.

The clean task allready does pattern interpretation.

ferventcoder/ffi,yghannam/ffi,MikaelSmith/ffi,MikaelSmith/ffi,ffi/ffi,majioa/ffi,MikaelSmith/ffi,ferventcoder/ffi,sparkchaser/ffi,yghannam/ffi,ferventcoder/ffi,majioa/ffi,yghannam/ffi,yghannam/ffi,sparkchaser/ffi,ffi/ffi,MikaelSmith/ffi,majioa/ffi,sparkchaser/ffi,ferventcoder/ffi,ffi/ffi,yghannam/ffi,majioa/ffi,sparkchaser/ffi