boost-1.70: Fix cmake reported static file location
boost-1.70: Fix cmake reported static file location

Begasus/haikuports,moochris/haikuports,moochris/haikuports,Begasus/haikuports,haikuports/haikuports,haikuports/haikuports,haikuports/haikuports,haikuports/haikuports,moochris/haikuports,Begasus/haikuports,Begasus/haikuports,haikuports/haikuports,Begasus/haikuports