elf.cc: update list of core objects

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
vfs: implement truncate64

Needed to link with boost_filesystem.

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
Stub calls needed to link and run with boost_unit_test_framework

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
Stub functions needed to link with boost filesystem

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
tst-rename: convert to boost unit test framework

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>