Support sccache being copied/hardlinked to a different name
Support sccache being copied/hardlinked to a different name

Resolves #44.

glandium/sccache,glandium/sccache,glandium/sccache,mozilla/sccache,mozilla/sccache,luser/sccache2,luser/sccache2,luser/sccache2,mozilla/sccache,glandium/sccache,luser/sccache2