fix compilation with clang on bgq
up #351: enable build static and set .a suffix
up #351: support both shared and static libs for cln, gflags and glog
now if feel++ is build statically then use static libs also for cln, gflags and glog
up #351 : update build scripts
up #351 add test mpi
Merge branch 'develop' of https://github.com/feelpp/feelpp into develop