o_trunc not supported, in according to https://github.com/zerovm/zerovm/issues/267
Merge pull request #112 from YaroslavLitvinov/tar_write

o_trunc not supported
fixed issue #57, test fixed
test coverage generator added; need to recompile toolchain
always add debug info
Merge pull request #113 from YaroslavLitvinov/lazymount-fix

Lazymount fix