add back lrt for linux
add back lrt for linux

habanero-rice/hclib,habanero-rice/hclib,habanero-rice/hclib,habanero-rice/hclib,habanero-rice/hcpp,habanero-rice/hcpp,habanero-rice/hcpp,habanero-rice/hclib,habanero-rice/hcpp,habanero-rice/hclib,habanero-rice/hclib